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hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> hair being positively charged <mask> static electricity | causes |
hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> hair being positively charged causes <mask> electricity | static |
hair is an object that causes static electricity by losing electrons & losing electrons changes the charge of an object into positive -> hair being positively charged causes static <mask> | electricity |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the <mask> of proton is greater than the number of electrons, then the electric charge will be positive | number |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the number of <mask> is greater than the number of electrons, then the electric charge will be positive | proton |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the number of proton is greater than the <mask> of electrons, then the electric charge will be positive | number |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the number of proton is greater than the number of electrons, then the <mask> charge will be positive | electric |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the number of proton is greater than the number of electrons, then the electric <mask> will be positive | charge |
a proton has a positive (+1) electrical charge & a electron has a negative (-1) electric charge -> if the number of proton is greater than the number of electrons, then the electric charge will be <mask> | positive |
an atom has 5 protons & that atom has 4 electrons -> the <mask> of protons is greater than the number of electrons | number |
an atom has 5 protons & that atom has 4 electrons -> the number of <mask> is greater than the number of electrons | protons |
an atom has 5 protons & that atom has 4 electrons -> the number of protons is greater than the <mask> of electrons | number |
an atom has 5 protons & that atom has 4 electrons -> the number of protons is greater than the number of <mask> | electrons |
if the number of proton is greater than the number of electrons, then the electric charge will be positive & the number of protons is greater than the number of electrons -> the <mask> will be positively charged | atom |
if the number of proton is greater than the number of electrons, then the electric charge will be positive & the number of protons is greater than the number of electrons -> the atom will be positively <mask> | charged |
an normal atom has a neutral electric charge & charge is a property of an atom and includes values of negatively-charged, neutral, or positively-charged -> an <mask> is neutral in electric charge property | atom |
an normal atom has a neutral electric charge & charge is a property of an atom and includes values of negatively-charged, neutral, or positively-charged -> an atom is <mask> in electric charge property | neutral |
an normal atom has a neutral electric charge & charge is a property of an atom and includes values of negatively-charged, neutral, or positively-charged -> an atom is neutral in <mask> charge property | electric |
an normal atom has a neutral electric charge & charge is a property of an atom and includes values of negatively-charged, neutral, or positively-charged -> an atom is neutral in electric <mask> property | charge |
an normal atom has a neutral electric charge & charge is a property of an atom and includes values of negatively-charged, neutral, or positively-charged -> an atom is neutral in electric charge <mask> | property |
ions are formed by atoms losing or gaining electrons & a chemical reaction can cause atoms to lose or gain electrons -> a <mask> reaction can cause ions to form | chemical |
ions are formed by atoms losing or gaining electrons & a chemical reaction can cause atoms to lose or gain electrons -> a chemical <mask> can cause ions to form | reaction |
ions are formed by atoms losing or gaining electrons & a chemical reaction can cause atoms to lose or gain electrons -> a chemical reaction can <mask> ions to form | cause |
ions are formed by atoms losing or gaining electrons & a chemical reaction can cause atoms to lose or gain electrons -> a chemical reaction can cause <mask> to form | ions |
ions are formed by atoms losing or gaining electrons & a chemical reaction can cause atoms to lose or gain electrons -> a chemical reaction can cause ions to <mask> | form |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> <mask> are the charged particles formed during a chemical reaction | ions |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> ions are the <mask> particles formed during a chemical reaction | charged |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> ions are the charged <mask> formed during a chemical reaction | particles |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> ions are the charged particles <mask> during a chemical reaction | formed |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> ions are the charged particles formed during a <mask> reaction | chemical |
a chemical reaction can cause ions to form & an ion is a kind of charged particle -> ions are the charged particles formed during a chemical <mask> | reaction |
a solid is a kind of substance & iron is a kind of solid -> <mask> is a kind of substance | iron |
a solid is a kind of substance & iron is a kind of solid -> iron is a <mask> of substance | kind |
a solid is a kind of substance & iron is a kind of solid -> iron is a kind of <mask> | substance |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> <mask> melting is when iron changes from a solic into a liquid by increasing heat energy | iron |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron <mask> is when iron changes from a solic into a liquid by increasing heat energy | melting |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when <mask> changes from a solic into a liquid by increasing heat energy | iron |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when iron <mask> from a solic into a liquid by increasing heat energy | changes |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when iron changes from a solic into a <mask> by increasing heat energy | liquid |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when iron changes from a solic into a liquid by <mask> heat energy | increasing |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when iron changes from a solic into a liquid by increasing <mask> energy | heat |
iron is a kind of substance & melting means a substance changes from a solid into a liquid by increasing heat energy -> iron melting is when iron changes from a solic into a liquid by increasing heat <mask> | energy |
iron melting is when iron changes from a solic into a liquid by increasing heat energy & temperature is a measure of heat energy -> the <mask> of iron is increased when iron is melting | temperature |
iron melting is when iron changes from a solic into a liquid by increasing heat energy & temperature is a measure of heat energy -> the temperature of <mask> is increased when iron is melting | iron |
iron melting is when iron changes from a solic into a liquid by increasing heat energy & temperature is a measure of heat energy -> the temperature of iron is <mask> when iron is melting | increased |
iron melting is when iron changes from a solic into a liquid by increasing heat energy & temperature is a measure of heat energy -> the temperature of iron is increased when <mask> is melting | iron |
iron melting is when iron changes from a solic into a liquid by increasing heat energy & temperature is a measure of heat energy -> the temperature of iron is increased when iron is <mask> | melting |
the temperature of iron is increased when iron is melting & as temperature increases , the speed of molecules will increase -> the <mask> of particles in iron increases | speed |
the temperature of iron is increased when iron is melting & as temperature increases , the speed of molecules will increase -> the speed of <mask> in iron increases | particles |
the temperature of iron is increased when iron is melting & as temperature increases , the speed of molecules will increase -> the speed of particles in <mask> increases | iron |
the temperature of iron is increased when iron is melting & as temperature increases , the speed of molecules will increase -> the speed of particles in iron <mask> | increases |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a <mask> is used to speed up the rate of a chemical reaction | catalyst |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a catalyst is <mask> to speed up the rate of a chemical reaction | used |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a catalyst is used to <mask> up the rate of a chemical reaction | speed |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a catalyst is used to speed up the <mask> of a chemical reaction | rate |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a catalyst is used to speed up the rate of a <mask> reaction | chemical |
a catalyst is used to speed up the speed of a chemical reaction & rate means speed -> a catalyst is used to speed up the rate of a chemical <mask> | reaction |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> <mask> nitrogen atoms combining will form a molecule | two |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> two <mask> atoms combining will form a molecule | nitrogen |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> two nitrogen <mask> combining will form a molecule | atoms |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> two nitrogen atoms <mask> will form a molecule | combining |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> two nitrogen atoms combining will <mask> a molecule | form |
two nitrogen atoms combine & a molecule is made of atoms chemically combined / bonded -> two nitrogen atoms combining will form a <mask> | molecule |
metals in contact with water and oxygen will rust & a metal can is made of metal -> a <mask> can in contact with water and oxygen will rust | metal |
metals in contact with water and oxygen will rust & a metal can is made of metal -> a metal can in <mask> with water and oxygen will rust | contact |
metals in contact with water and oxygen will rust & a metal can is made of metal -> a metal can in contact with <mask> and oxygen will rust | water |
metals in contact with water and oxygen will rust & a metal can is made of metal -> a metal can in contact with water and <mask> will rust | oxygen |
metals in contact with water and oxygen will rust & a metal can is made of metal -> a metal can in contact with water and oxygen will <mask> | rust |
a pure substance is made of only one kind of atom / molecule & an element is made of one kind of atoms -> <mask> are pure substances | elements |
a pure substance is made of only one kind of atom / molecule & an element is made of one kind of atoms -> elements are pure <mask> | substances |
if something does not contain something else, then that something else cannot be found in that something & organic compounds do not contain potassium -> <mask> cannot be in organic compounds | potassium |
if something does not contain something else, then that something else cannot be found in that something & organic compounds do not contain potassium -> potassium cannot be in <mask> compounds | organic |
if something does not contain something else, then that something else cannot be found in that something & organic compounds do not contain potassium -> potassium cannot be in organic <mask> | compounds |
elements in the same group on the periodic table of elements have similar properties & krypton belongs to noble gases family , group 18 on the periodic table -> <mask> in group 18 have similar properties to krypton | elements |
elements in the same group on the periodic table of elements have similar properties & krypton belongs to noble gases family , group 18 on the periodic table -> elements in <mask> 18 have similar properties to krypton | group |
elements in the same group on the periodic table of elements have similar properties & krypton belongs to noble gases family , group 18 on the periodic table -> elements in group <mask> have similar properties to krypton | 18 |
elements in the same group on the periodic table of elements have similar properties & krypton belongs to noble gases family , group 18 on the periodic table -> elements in group 18 have similar <mask> to krypton | properties |
elements in the same group on the periodic table of elements have similar properties & krypton belongs to noble gases family , group 18 on the periodic table -> elements in group 18 have similar properties to <mask> | krypton |
copper is a kind of element & an element is made of one kind of atoms -> <mask> is made of copper atoms | copper |
copper is a kind of element & an element is made of one kind of atoms -> copper is <mask> of copper atoms | made |
copper is a kind of element & an element is made of one kind of atoms -> copper is made of <mask> atoms | copper |
copper is a kind of element & an element is made of one kind of atoms -> copper is made of copper <mask> | atoms |
copper is made of copper atoms & copper is a kind of element & the atom is the smallest unit / particle that has the properties of an element -> <mask> atoms are the smallest particles that are still copper | copper |
copper is made of copper atoms & copper is a kind of element & the atom is the smallest unit / particle that has the properties of an element -> copper <mask> are the smallest particles that are still copper | atoms |
copper is made of copper atoms & copper is a kind of element & the atom is the smallest unit / particle that has the properties of an element -> copper atoms are the smallest <mask> that are still copper | particles |
copper is made of copper atoms & copper is a kind of element & the atom is the smallest unit / particle that has the properties of an element -> copper atoms are the smallest particles that are <mask> copper | still |
copper is made of copper atoms & copper is a kind of element & the atom is the smallest unit / particle that has the properties of an element -> copper atoms are the smallest particles that are still <mask> | copper |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the <mask> of the elements in periodic table is determined by the proton number of elements | order |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the <mask> in periodic table is determined by the proton number of elements | elements |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the elements in periodic <mask> is determined by the proton number of elements | table |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the elements in periodic table is <mask> by the proton number of elements | determined |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the elements in periodic table is determined by the <mask> number of elements | proton |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the elements in periodic table is determined by the proton <mask> of elements | number |
atomic number is used to describe the proton number of an element & the order of the elements in periodic table is determined by the atomic number of the elements -> the order of the elements in periodic table is determined by the proton number of <mask> | elements |
sodium belong to alkali metals , group 1 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> <mask> in group 1 will have similar properties to sodium | elements |
sodium belong to alkali metals , group 1 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> elements in <mask> 1 will have similar properties to sodium | group |
sodium belong to alkali metals , group 1 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> elements in group <mask> will have similar properties to sodium | 1 |
sodium belong to alkali metals , group 1 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> elements in group 1 will have similar <mask> to sodium | properties |
sodium belong to alkali metals , group 1 on the periodic table & elements in the same group on the periodic table of elements have similar properties -> elements in group 1 will have similar properties to <mask> | sodium |
elements in group 1 will have similar properties to sodium & potassium belongs to alkali metals , group 1 on the periodic table -> potassiumn has similar <mask> to sodium | properties |