Chemistry A CP Unit 3 Practice Test

Front

How many neutrons does an atom of the isotope Neon-22 have?

Back

12

Front

What is the mass number defined as?

Back

The number of protons and neutrons

Front

How many electrons can the d sublevel hold?

Back

10

Front

What describes a valence electron?

Back

Outermost from nucleus, Most energetic, Determines chemical properties and bonding, All of the above

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an isotope and an ion?

Back

Isotopes have the same number of protons but different numbers of neutrons; ions have a different number of electrons than protons.

Front

What is the role of electrons in chemical bonding?

Back

Electrons in the outermost shell (valence electrons) are involved in forming bonds between atoms.

Front

What is a chemical reaction?

Back

A process that involves the rearrangement of the molecular or ionic structure of a substance.

Front

What is the periodic table?

Back

A tabular arrangement of the chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.