Atom Practice

Front

What is the sum of the number of neutrons and protons in an atomic nucleus called?

Back

Mass number

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

How many protons does sodium have if its atomic number is 11?

Back

11

Front

Where are electrons located in an atom?

Back

Electron Cloud (Outside the Nucleus)

Front

What is the mass number of an isotope with 79 protons and 118 neutrons?

Back

197

Front

What is the mass number defined as?

Back

The number of protons and neutrons in an atom.

Front

What is an isotope?

Back

Atoms of the same element with different numbers of neutrons.

Front

What is the charge of a proton?

Back

Positive charge.

Front

What is the charge of a neutron?

Back

No charge (neutral).

Front

What is the charge of an electron?

Back

Negative charge.