Chapter 4 vocab

Front

Positively charged subatomic particle:

Back

proton

Front

Tiny region at the center of an atom containing protons and neutrons, making up most of its mass:

Back

nucleus

Front

Atom differing in neutron count from others of the same element:

Back

isotope

Front

Area around an atom's nucleus where electrons are likely to be:

Back

electron cloud

Front

Protons + neutrons in an atom; approx. equal to mass in amu:

Back

mass number

Front

Smallest particle of an element with its properties:

Back

atom

Front

Neutral particle in an atom's nucleus:

Back

neutron

Front

Charged form of an atom that has lost or gained electrons:

Back

ion

Front

An electron is a:

Back

negatively charged subatomic particle

Front

Protons in an atom define:

Back

atomic number