Q1 Chemistry Review

Front

How many protons are in an element with atomic number 79?

Back

79 protons.

Front

What charge do electrons have?

Back

Electrons have a negative charge.

Front

What is a pure substance made of a single type of atom that cannot be broken down?

Back

An element.

Front

What is the atomic number of an element with 9 protons, 9 electrons, and 10 neutrons?

Back

9.

Front

What does the number at the top of each square on the periodic table represent?

Back

The number of protons in the atom.

Front

What is the definition of an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are neutrons?

Back

Neutrons are neutral particles found in the nucleus of an atom.

Front

What is a compound?

Back

A compound is a substance formed when two or more different elements are chemically bonded together.

Front

What is the difference between an element and a mixture?

Back

An element is a pure substance made of one type of atom, while a mixture contains two or more substances that are not chemically combined.

Front

What is the charge of protons?

Back

Protons have a positive charge.