Structure of the Atom

Front

The negatively (-) charged particles of an atom are the ______.

Back

electrons

Front

Which element has 31 protons?

Back

Gallium (Ga)

Front

What number indicates the nucleus?

Back

4

Front

What number indicates a proton?

Back

1

Front

What is the mass number?

Back

the number of protons plus the number of neutrons

Front

What are protons?

Back

Positively charged particles found in the nucleus of an atom.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What is an electron cloud?

Back

The region around the nucleus where electrons are likely to be found.

Front

What is atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average of an element's isotopes, while mass number is the total number of protons and neutrons.