Chemistry - Chapter 4 Vocab (Pearson)

Front

Smallest particle of an element that retains its identity in a chemical reaction.

Back

atom

Front

Theory stating: all elements are made of atoms; identical atoms for same element; different atoms combine to form compounds; chemical reactions involve atom separation.

Back

Dalton's atomic theory

Front

Negatively charged subatomic particles.

Back

electrons

Front

A glowing beam from cathode to anode.

Back

cathode ray

Front

Positively charged subatomic particles

Back

protons

Front

Subatomic particles with no charge.

Back

neutrons

Front

Tiny core of an atom, made of protons and neutrons.

Back

nucleus

Front

Number of protons in an atom's nucleus.

Back

atomic number

Front

Total protons + neutrons in an element

Back

mass number

Front

Atoms with the same protons but different neutrons.

Back

isotopes