Chemistry test

What is an atom’s nucleus made of?

• protons
• neutrons
• protons and electrons
• protons and neutrons

How many protons are in Lithium?

• 3
• 6.94
• 3.94
• 9.94

How many electrons are in Lithium?

• 3
• 6.94
• 3.94
• 9.94

How many neutrons are in Lithium?

• 3
• 6.94
• 3.94
• 9.94

Elements are arranged on the periodic table by

• atomic number, atomic mass, and period
• atomic mass, period, and group
• atomic number, atomic mass, and group
• atomic number, period, and group

A gas

• Has a definite volume but no definite shape.
• Has a definite shape but no definite volume.
• Has no definite shape and no definite volume.
• Has particles that are always close together.

In a solid, the particles

• overcome the strong attraction between them.
• vibrate in place.
• slide past one another.
• move independently of one another.

The __ states that matter cannot be created or destroyed during a physical or chemical change.

• law of chemical equations
• law of matter creation
• law of conservation of mass
• law of undestroyable mass

When two or more different elements join together chemically,

• a compound is formed.
• a mixture is formed.
• a substance that is the same as the element is formed.
• the physical properties of the substance remain the same.

Melting iron

• Chemical change
• Physical change