Chemistry Vocabulary

the total number of protons and neutrons in a nucleus is the ......

the number of protons & electrons contained in the atom (element) is the .....

a chemical reaction characterized by or causing the liberation or release of heat is a ....

a substance whose atoms all have the same number of protons is a(n) .....

When two or more elements are composed together it is called a .....

the basic unit of a chemical element is a(n) ......

a substance that takes part in and undergoes change during a reaction is a ....

a negatively-charged subatomic particle occurring in all atoms is a(n) .....

Any change that occurs without altering the chemical composition of a substance is a .....

a positive-charged subatomic particle occurring in all atomic nuclei is a ....

involves rearrangement of the molecular or ionic structure of a substance is called a ....

anything that has mass & takes up space is .....

where one or more substances are altered into one or more new & different substances is a .....

atoms of the same element with a different number of neutrons is a(n) ...

the mass of an atom of a chemical element expressed in atomic mass units is the ....

chemical reaction that is accompanied by the absorption of heat is a .....

a group of atoms bonded together is a ....

a substance that is formed as the result of chemical reaction is a ...

where mass is neither created nor destroyed is called the ...

a table of the chemical elements arranged in order of atomic number is the ...

a neutrally-charged subatomic particle occurring in all atomic nuclei is a .....