Chapter 9 Lesson 2

Front

What does Niels Bohr's model of an atom resemble?

Back

The solar system.

Front

How do you correctly write the chemical formula for carbon dioxide?

Back

CO₂

Front

What is the center of an atom called?

Back

Nucleus.

Front

What is a substance that cannot be broken down into something simpler?

Back

Element.

Front

What particle in the nucleus of an atom has a positive charge?

Back

Proton.

Front

What is the term for the negatively charged particle in an atom?

Back

Electron.

Front

What is the smallest unit of an element?

Back

Atom.

Front

What is the term for a substance made of two or more elements chemically combined?

Back

Compound.

Front

What is the charge of a neutron?

Back

Neutral (no charge).

Front

What do we call the number of protons in the nucleus of an atom?

Back

Atomic number.