Post on 18-Jan-2016
Unit 3 Review Game
Who theorized that everything was made of atoms and these atoms could be combined or rearranged in chemical reactions.
Dalton
Who discovered atoms contained a small dense positive region?
Rutherford
Which subatomic particles have the same mass?
Protons and Neutrons
In neutral atoms, which subatomic particles are equal?
Protons and electrons
What makes up the nucleus of the atom?
Protons and neutrons
What keeps the protons in the nucleus together?
The strong nuclear force
What is the force that says opposites attract?
Electrostatic force
What is the difference between isotopes?
# of neutrons
Nitrogen- 16 has how many protons, neutrons, and electrons
Protons- 7, Neutrons-9, Electrons-7
What does the atomic # tell us?
number of protons
What makes a carbon atom a carbon atom?
The number of protons
What do you need to calculated the weighted average?
Mass of isotopes and their % abundance
What is the top # in the following symbol?
Mass #
C146
What is the bottom number in the following symbol?
Atomic #
O208
What is the mass defect?
mass of nucleus does not equal sum of parts
What formula is used to explain the mass defect?
E=mc2
What is an alpha particle?
He42
What is a beta particle?
e0-1
What stops each of the types of radioactive particles?
alpha- paper, beta- wood/metal foil, gamma- lead/concrete
What is the half life?
Amount of time for half of the radioactive isotopes to decay
What type of reaction creates a chain reaction?
Fission
What type of reaction releases more energy?
Nuclear or fusion
Know how to solve a half life problem and balance equations