Atomic Structure Test

Front

What is an atom?

Back

An atom is the basic unit of matter.

Front

How many protons does an oxygen atom have?

Back

8 protons.

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What subatomic particle has the least mass?

Back

Electrons have the least mass.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the role of neutrons in an atom?

Back

Neutrons help stabilize the nucleus of an atom.

Front

What is the difference between atomic mass and atomic number?

Back

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

Front

What is a valence electron?

Back

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

Front

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

Back

Subtract the atomic number from the atomic mass.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number and properties.