The periodic table pt. 1

How many protons does an atom of Argon have?

• 18

• 38

• 39

• 40

Answer explanation

The atomic number always tells you the number of protons.

What is the mass number of Lithium?

• 3

• 4

• 7

• 10

Answer explanation

The mass number is always at the bottom of the element symbol. Mass number = protons + neutrons.

How many neutrons does an atom of Lithium have?

• 3

• 4

• 7

• 10

Answer explanation

Neutrons = mass number - atomic number

What is the name of this element?

• Helium
• Hydrogen
• Argon
• Silver

What element is represented in this Bohr Model?

• Carbon

• Hydrogen

• Aluminum

• Lithium

What is the name of this element?

• Lithium
• Boron
• Carbon
• Neon

What is the mass number of this atom?

• 1
• 3
• 4
• 7

What is the atomic number of this atom?

• 2
• 4
• 6
• none of the above

an element will always have the same number of 

• neutrons
• protons
• isotopes
• atoms

How many electrons can fit on the 1st energy level (orbital) for any Bohr Model?

• 2

• 6

• 8

• 10