P.S. Exam review ch2-4

Front

What charge does an electron have?

Back

Negative charge.

Front

Where does an electron live in relation to the nucleus?

Back

Outside the nucleus.

Front

What is the mass of an electron?

Back

Has no mass.

Front

What are diatomic molecules?

Back

Molecules found in nature as pairs of two atoms of the same type covalently bonded together.

Front

What model of the atom did Dalton propose?

Back

Atoms are spheres, known as the billiard ball model.

Front

What are the rows on the periodic table called?

Back

Periods.

Front

What are the columns on the periodic table called?

Back

Groups.

Front

What type of atom has a positive charge?

Back

Cation.

Front

What type of atom has a negative charge?

Back

Anion.

Front

What is an isotope?

Back

An atom that has the same number of protons but a different number of neutrons.