First Quarter Review

What is atomic number?

• Number of protons in an atoms 

• Number of neutrons in an atom

• Mass of an atom

• Charge on an atom

Which subatomic particles are found in the nucleus of an atom?

• Protons and Electrons

• Protons and Neutrons

• Neutrons and Electrons

• Protons, Neutrons and Electrons

The subatomic particles in green are...

• Protons

• Neutrons

• Electrons

How many electron shells/levels does this atom have?

• 1

• 2

• 3

• 4

What's a valence electron?

• electrons in the second energy level

• electrons in the outermost energy level

• the atomic number

• electrons in the first level

On the periodic table, Groups are

• Horizontal rows

• Vertical columns

On the periodic table, Periods are

• Horizontal rows

• Vertical columns

The innermost energy level has a maximum of how many electrons?

• 1

• 2

• 6

• 8

If an atom of Phosphorus has 16 neutrons, what is it's mass number?

• 15

• 16

• 30.974

• 32

What is the coefficient in 6NO₂?

• 1

• 2

• 6

• 12