Chemical Formulas and Atomic Structure Test

Front

What is H₂O?

Back

H₂O is a compound made of two hydrogen atoms and one oxygen atom.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, typically measured in atomic mass units (amu).

Front

Which subatomic particle determines the identity of an atom?

Back

The proton determines the identity of an atom.

Front

How do you count the number of electrons in a neutral atom?

Back

You count the number of electrons by looking at the atomic number.

Front

What is the charge of a -1 ion?

Back

A -1 ion has one more electron than protons, giving it a negative charge.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements chemically bond together.

Front

What is the atomic number?

Back

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

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom, with no charge.

Front

What is an electron?

Back

An electron is a negatively charged subatomic particle that orbits the nucleus of an atom.