Bohr Model

What is the name of this element?

• Helium
• Hydrogen
• Argon
• Silver

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

How many valence electrons?

• 2
• 3
• 5
• 10

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

What is this element?

• Beryllium (atomic #4)

• Boron (atomic #5)

• Carbon (atomic #6)

• Nitrogen (atomic #7)

What group does this element belong to?

• 1

• 2

• 17

• 18