Atomic Structure Review

Subatomic particles with a negative charge

• Electrons

• Neutrons

• Protons

• Quarks

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes

Subatomic particles that are neutral in charge

• Neutrons
• Protons
• Nucleus 
• Electrons

This is how you find the number of neutrons in an atom. 

• Subtract the atomic number from the atomic mass
• Subtract the atomic mass from the atomic number 
• Add the atomic mass to the atomic number 
• Divide the atomic mass by the atomic number 

How many protons does an O₂ atom have?

• 8
• 24
• 16
• When is lunch? 

Found orbiting outside the nucleus, this subatomic particle has a negative charge.

• Neutron

• Proton

• Electron

• Idontknowatron

How many protons does indium have?

• 49

• 66

• 114

• 115

What is the atomic mass of barium

• 56

• 82

• 137

• 138

How many neutrons does platinum have?

• 78

• 117

• 195

• 196

If an atom has 3 electrons, how many protons does it have?

• 1
• 2
• 4
• 3