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a rubber rubbing on wool is an example of rubbing different materials together & rubbing different materials can cause electrical charge of the materials to be unbalanced -> rubbing rubber on wool causes electrical charge of rubber and <mask> to be unbalanced | wool |
a rubber rubbing on wool is an example of rubbing different materials together & rubbing different materials can cause electrical charge of the materials to be unbalanced -> rubbing rubber on wool causes electrical charge of rubber and wool to be <mask> | unbalanced |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> <mask> rubber on wool causes static electricity on rubber and wool | rubbing |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing <mask> on wool causes static electricity on rubber and wool | rubber |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on <mask> causes static electricity on rubber and wool | wool |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on wool <mask> static electricity on rubber and wool | causes |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on wool causes <mask> electricity on rubber and wool | static |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on wool causes static <mask> on rubber and wool | electricity |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on wool causes static electricity on <mask> and wool | rubber |
rubbing rubber on wool causes electrical charge of rubber and wool to be unbalanced & unbalanced electrical charge of material causes static electricity -> rubbing rubber on wool causes static electricity on rubber and <mask> | wool |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> <mask> rubber on wool can cause rubber to attract small, light-weighted object | rubbing |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing <mask> on wool can cause rubber to attract small, light-weighted object | rubber |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing rubber on <mask> can cause rubber to attract small, light-weighted object | wool |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing rubber on wool can <mask> rubber to attract small, light-weighted object | cause |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing rubber on wool can cause <mask> to attract small, light-weighted object | rubber |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing rubber on wool can cause rubber to <mask> small, light-weighted object | attract |
rubbing rubber on wool causes static electricity on rubber and wool & static electricity can attract small, light-weighted object -> rubbing rubber on wool can cause rubber to attract small, light-weighted <mask> | object |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> <mask> rubber on wool can cause rubber to attract small strips of paper | rubbing |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing <mask> on wool can cause rubber to attract small strips of paper | rubber |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on <mask> can cause rubber to attract small strips of paper | wool |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can <mask> rubber to attract small strips of paper | cause |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can cause <mask> to attract small strips of paper | rubber |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can cause rubber to <mask> small strips of paper | attract |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can cause rubber to attract <mask> strips of paper | small |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can cause rubber to attract small <mask> of paper | strips |
rubbing rubber on wool can cause rubber to attract small, light-weighted object & small strips of paper are small and light-weighted & strips of paper are a kind of object -> rubbing rubber on wool can cause rubber to attract small strips of <mask> | paper |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> <mask> numbers of protons and electrons result in a neutral 0 electric charge | equal |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal <mask> of protons and electrons result in a neutral 0 electric charge | numbers |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of <mask> and electrons result in a neutral 0 electric charge | protons |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and <mask> result in a neutral 0 electric charge | electrons |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and electrons <mask> in a neutral 0 electric charge | result |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and electrons result in a <mask> 0 electric charge | neutral |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and electrons result in a neutral <mask> electric charge | 0 |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and electrons result in a neutral 0 <mask> charge | electric |
an electron has a negative -1 electric charge & a proton has a positive 1 electric charge -> equal numbers of protons and electrons result in a neutral 0 electric <mask> | charge |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> <mask> numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge | equal |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal <mask> of protons and electrons and any number of neutrons result in a neutral 0 electric charge | numbers |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of <mask> and electrons and any number of neutrons result in a neutral 0 electric charge | protons |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and <mask> and any number of neutrons result in a neutral 0 electric charge | electrons |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any <mask> of neutrons result in a neutral 0 electric charge | number |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of <mask> result in a neutral 0 electric charge | neutrons |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of neutrons <mask> in a neutral 0 electric charge | result |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of neutrons result in a <mask> 0 electric charge | neutral |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of neutrons result in a neutral <mask> electric charge | 0 |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of neutrons result in a neutral 0 <mask> charge | electric |
equal numbers of protons and electrons result in a neutral 0 electric charge & a neutron has a neutral electric charge -> equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric <mask> | charge |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an <mask> has an equal number of protons and electrons, then the atom will have a neutral charge | atom |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an <mask> number of protons and electrons, then the atom will have a neutral charge | equal |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an equal <mask> of protons and electrons, then the atom will have a neutral charge | number |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an equal number of <mask> and electrons, then the atom will have a neutral charge | protons |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an equal number of protons and electrons, then the <mask> will have a neutral charge | atom |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an equal number of protons and electrons, then the atom will have a <mask> charge | neutral |
equal numbers of protons and electrons and any number of neutrons result in a neutral 0 electric charge & an atom is made of protons / neutrons / electrons -> if an atom has an equal number of protons and electrons, then the atom will have a neutral <mask> | charge |
if an atom has an equal number of protons and electrons, then the atom will have a neutral charge & an normal atom has a neutral electric charge -> that <mask> has an equal number of protons and electrons | atom |
if an atom has an equal number of protons and electrons, then the atom will have a neutral charge & an normal atom has a neutral electric charge -> that atom has an <mask> number of protons and electrons | equal |
if an atom has an equal number of protons and electrons, then the atom will have a neutral charge & an normal atom has a neutral electric charge -> that atom has an equal <mask> of protons and electrons | number |
if an atom has an equal number of protons and electrons, then the atom will have a neutral charge & an normal atom has a neutral electric charge -> that atom has an equal number of <mask> and electrons | protons |
if an atom has an equal number of protons and electrons, then the atom will have a neutral charge & an normal atom has a neutral electric charge -> that atom has an equal number of protons and <mask> | electrons |
an atom has an atomic number of 20 & atomic number is used to describe the proton number of an atom -> the <mask> has 20 protons | atom |
an atom has an atomic number of 20 & atomic number is used to describe the proton number of an atom -> the atom has <mask> protons | 20 |
an atom has an atomic number of 20 & atomic number is used to describe the proton number of an atom -> the atom has 20 <mask> | protons |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a <mask> molecure is made of 2 hydrogen atoms and 1 oxygen atom bonded together | water |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is <mask> of 2 hydrogen atoms and 1 oxygen atom bonded together | made |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of <mask> hydrogen atoms and 1 oxygen atom bonded together | 2 |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 <mask> atoms and 1 oxygen atom bonded together | hydrogen |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 hydrogen <mask> and 1 oxygen atom bonded together | atoms |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 hydrogen atoms and <mask> oxygen atom bonded together | 1 |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 hydrogen atoms and 1 <mask> atom bonded together | oxygen |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 hydrogen atoms and 1 oxygen <mask> bonded together | atom |
a water molecure is made of 2 hydrogen atoms and 1 oxygen atom & a molecule is made of atoms bonded -> a water molecure is made of 2 hydrogen atoms and 1 oxygen atom <mask> together | bonded |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the <mask> of electron, proton, and neutron is determined by the mass of proton and neutron | mass |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the mass of electron, proton, and <mask> is determined by the mass of proton and neutron | neutron |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the mass of electron, proton, and neutron is <mask> by the mass of proton and neutron | determined |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the mass of electron, proton, and neutron is determined by the <mask> of proton and neutron | mass |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the mass of electron, proton, and neutron is determined by the mass of <mask> and neutron | proton |
one proton has one atomic mass unit & one electron has 0 atomic mass unit & one neutron has one atomic mass unit & an atom is made of protons / neutrons / electrons -> the mass of electron, proton, and neutron is determined by the mass of proton and <mask> | neutron |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> <mask> is a kind of object that tends to lose electrons after being rubbed with other materials | hair |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a <mask> of object that tends to lose electrons after being rubbed with other materials | kind |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of <mask> that tends to lose electrons after being rubbed with other materials | object |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of object that <mask> to lose electrons after being rubbed with other materials | tends |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of object that tends to <mask> electrons after being rubbed with other materials | lose |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of object that tends to lose <mask> after being rubbed with other materials | electrons |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of object that tends to lose electrons after being <mask> with other materials | rubbed |
a hair is a kind of object & hair tends to lose electrons after being rubbed with other mateirals -> hair is a kind of object that tends to lose electrons after being rubbed with other <mask> | materials |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> <mask> losing electrons causes the electrical charge of hair to be unbalanced | hair |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair <mask> electrons causes the electrical charge of hair to be unbalanced | losing |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair losing <mask> causes the electrical charge of hair to be unbalanced | electrons |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair losing electrons <mask> the electrical charge of hair to be unbalanced | causes |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair losing electrons causes the electrical <mask> of hair to be unbalanced | charge |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair losing electrons causes the electrical charge of <mask> to be unbalanced | hair |
hair is a kind of object that tends to lose electrons after being rubbed with other materials & losing electrons causes the electrical charge of an object to be unbalanced -> hair losing electrons causes the electrical charge of hair to be <mask> | unbalanced |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> <mask> is an object that causes static electricity by losing electrons | hair |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an <mask> that causes static electricity by losing electrons | object |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an object that <mask> static electricity by losing electrons | causes |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an object that causes <mask> electricity by losing electrons | static |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an object that causes static <mask> by losing electrons | electricity |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an object that causes static electricity by <mask> electrons | losing |
hair losing electrons causes the electrical charge of hair to be unbalanced & unbalanced electrical charge of object causes static electricity & a hair is a kind of object -> hair is an object that causes static electricity by losing <mask> | electrons |
hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> <mask> being positively charged causes static electricity | hair |
hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> hair being positively <mask> causes static electricity | charged |