Midterm Review

What are valence electrons?

• Electrons that do not have a negative charge
• The outermost electrons in an atom
• Electrons that do not change the charge of the atom

What is the charge of an atom that has gained 2 electrons?

• (+)2
• 0
• -2

What model did John Dalton create?

• plum pudding
• planeary
• solid sphere

What model did JJ Thompson create?

• solid sphere
• plum pudding
• planeary

What model did Niels Bohr create?

• planeary
• solid sphere
• plum pudding

How many protons are in Neon?

• 10
• 11
• 20

How many neutrons are in Neon?

• 14
• 10
• 20

What is the overall charge of this atom?

• (+)2
• 8
• -2

What subatomic particle has a neutral charge?

• proton
• electron
• neutron

What subatomic particle has a positive charge?

• neutron
• proton
• electron