Atomic Basics

What is the nucleus? 

• The center (middle) of the atom
• The outside electron cloud
• The area inside the electron charge
• The positive or negative charge of the atom 

What two sub-atomic particles are inside the nucleus of the atom? 

• Protons and Electrons
• Electrons and Neutrons
• Protons and Nucleus 
• Protons and Neutrons 

Which sub-atomic particle is OUTSIDE the nucleus of the atom? 

• Electron
• Neutron
• Proton
• Nucleus 

Neutral Atom

• the same amount of protons and electrons

• an atom with an overall charge (not neutral)

  proton does not equal electrons 

• the mass of a specific atom

• variation of an element based on mass 

Atomic Mass

• the average mass of all the types of an isotope for an element taking into account their abundance

• the mass of a specific atom

• number of proton

What is the atomic number of the atom pictured? 

• 9
• 10
• 18
• 19

This particle determines what element you have - the elements identity.

• electron
• proton
• neutron
• valence shell

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

which explanation of this notation is correct?

•  12 is proton #
• 6 tells you there are 6 neutrons
• 6 tells you there are 6 protons
• 12 is not a mass # here

How many electrons does oxygen have?

• 8

• 16

• 0

• 15