Chemistry Review

Front

What does a subscript number indicate in a chemical formula?

Back

The number of atoms of each element in a molecule.

Tags

NGSS.MS-PS1-1

Front

How many electrons does a Boron atom contain?

Back

5

Tags

NGSS.MS-PS1-1

Front

What charge does an electron carry?

Back

Negative

Front

In a chemical equation, what are the substances on the left side called?

Back

Reactants

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Front

What is the atomic mass of an atom with 7 protons and 7 neutrons?

Back

7

Front

What is the definition of an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the difference between a molecule and a compound?

Back

A molecule is two or more atoms bonded together, while a compound is a molecule that contains at least two different elements.

Tags

NGSS.MS-PS1-1

Front

What is the role of coefficients in a chemical equation?

Back

Coefficients indicate the number of molecules or moles of a substance involved in a reaction.

Front

What is the definition of atomic number?

Back

The number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is a proton's charge?

Back

Positive