Module 1 Review

Front

What charge will likely form on an ion with 3 valence electrons?

Back

+3

Front

What is the mass number of an atom?

Back

The sum of the number of protons and the number of neutrons in the nucleus of an atom.

Front

If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, what is its atomic mass?

Back

32

Front

What does the atomic number indicate for a given element?

Back

The number of protons in the nucleus.

Front

What are the positive particles of an atom called?

Back

Protons.

Front

Define valence electrons.

Back

Electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

How do you determine the number of neutrons in an atom?

Back

Subtract the atomic number from the mass number.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of an element.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average mass of an element's isotopes, while mass number is the total number of protons and neutrons.