Atomic Structure

Front

What is the tiny, dense, positively charged portion of the atom that holds most of the atomic mass?

Back

Nucleus

Front

What equals the number of protons in an atom of an element?

Back

Atomic number

Front

How many protons does an aluminium atom have?

Back

13

Front

What are subatomic particles with a negative charge?

Back

Electrons

Front

Atoms of the same element must always have the same number of what?

Back

Protons

Front

What are the three main subatomic particles?

Back

Protons, Neutrons, Electrons

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the charge of an electron?

Back

Negative

Front

What is the term for atoms of the same element with different numbers of neutrons?

Back

Isotopes