Unit 2 Practice Test: Matter and Interactions

Front

What particles are found in the nucleus of the atom?

Back

Protons and neutrons.

Front

How many valence electrons does Lithium (Li) have?

Back

1.

Front

What type of nuclear decay is represented by the equation: 214Bi → 0-1e + 214Po?

Back

Beta decay.

Front

What is a valence electron?

Back

An electron that is found in the outermost shell of an atom.

Front

Complete the equation: 209Bi → _______ + 205Tl.

Back

4He.

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 atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.