atoms and molecules

Front

What is the chemical formula for water?

Back

H2O

Front

How many hydrogen atoms are in a water molecule (H2O)?

Back

2

Front

What is NaCl commonly known as?

Back

Table salt

Front

What is an atom?

Back

The smallest unit of matter that cannot be broken down into smaller pieces.

Front

What defines an element?

Back

An element is made up of the same type of atoms.

Front

What does the atomic number represent on the periodic table?

Back

The atomic number indicates the number of protons and electrons in an atom.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What is the difference between an atom and a molecule?

Back

An atom is a single unit of matter, while a molecule is made up of two or more atoms bonded together.

Front

What is the significance of protons in an atom?

Back

Protons determine the atomic number and the identity of the element.

Front

What is the charge of a neutron?

Back

Neutrons have no charge (they are neutral).