Atoms Unit Test

Front

What is the main property of Noble Gases?

Back

They have a full outer shell.

Front

In a Bohr diagram, what does the letter 'P' stand for in the nucleus?

Back

Protons.

Front

What are valence electrons?

Back

Electrons in the outermost shell.

Front

What distinguishes one element from another?

Back

The atomic number.

Front

What is the main component of the atomic nucleus?

Back

Protons and neutrons.

Front

What is an atom?

Back

The basic unit of a chemical element.

Front

What are neutrons?

Back

Neutral particles found in the nucleus of an atom.

Front

What is the atomic number?

Back

The number of protons in the nucleus of an atom.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the role of electrons in an atom?

Back

Electrons are negatively charged particles that orbit the nucleus and are involved in chemical bonding.