Structure of Atoms

Front

What is the charge and location of a neutron?

Back

Neutrons have no charge and are in the nucleus.

Front

What is the charge and location of an electron?

Back

Electrons have a negative charge and are in the electron cloud.

Front

Which particles are found in the cloud around the nucleus?

Back

electrons

Front

Why does the nucleus of an atom always have a positive charge?

Back

The nucleus is positive because it contains protons.

Front

Which subatomic particle has much less mass than the other two?

Back

electron

Front

How do you identify an element?

Back

By matching the number of protons to the atomic number

Front

What does an element's atomic number tell you?

Back

number of protons

Front

Valence electrons

Back

Valence electrons are the electrons in the outer energy level.

Front

What determines an element's chemical reactivity?

Back

The number of valence electrons

Front

What numbers on the Periodic Table tell you how many valence electrons an element has?

Back

The numbers attached to the A's and B's at the top of each group