Atoms 2

Makes up the atomic mass...

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

Purest form of a substance...

• element
• proton
• compound
• molecule

If an element has an atomic number of 12, how many electrons will it have if it has a neutral charge?

• 6
• 24
• 12

How many valence electrons does bromine have? It is in group 17!

• 17
• 1
• 7
• 8

The least reactive group in the periodic table?

• 1
• 2
• 17
• 18

What is the maximum number of electrons that can go on the second energy level?

• 18
• 8
• 2
• 1

How many neutrons are in mercury?

• 80
• 200.59
• 121
• 201

How many valence electrons does potassium have?

• 2
• 1
• 7
• 8

How do you determine the number of neutrons in an atom?

• subtract the atomic mass from the atomic number
• subtract the atomic number from the rounded atomic mass
• add the protons and electrons

The most reactive group in the periodic table..

• group 1
• group 16
• group 18
• all of these