Ch. 2 Vocab Flashcard

Front

An atom that is no longer neutral due to gained or lost electrons.

Back

Ion

Front

Sum of protons & neutrons in an atom

Back

Mass Number

Front

Number of protons in an atom

Back

Atomic Number

Front

Any element that emits radiation

Back

Radioactive

Front

Atoms of the same element with different neutrons and protons

Back

Isotope

Front

Process where an unstable atomic nucleus emits radiation to become stable.

Back

Nuclear Decay

Front

Region around an atom's nucleus where electrons are likely found

Back

Electron Cloud

Front

Smallest piece of an element representing it, building blocks of matter

Back

Atom

Front

Small, dense positively charged particle in the atom's center

Back

Nucleus

Front

Atomic particle with +1 charge

Back

Proton