Unit 1 Test Review (PS1-1, PS1-4)

Front

What happens to the particles of a substance when heat is added?

Back

The particles speed up.

Front

How many sodium atoms are in NaCl2?

Back

1

Front

How can hydrogen and oxygen combine to form molecules?

Back

Hydrogen and oxygen can combine in many ways to form different molecules.

Front

List the elements in C8H10AsNO5.

Back

carbon, hydrogen, arsenic, nitrogen, oxygen

Front

Is NO2 an element or a molecule?

Back

molecule

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter.

Front

What is a molecule?

Back

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

Front

What is the chemical formula for water?

Back

H2O

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms bonded together.

Front

What is the significance of the subscript in a chemical formula?

Back

The subscript indicates the number of atoms of the element in the molecule.