Half Life
After 175 days, how many half-lives of Argon-37 (half life is 35 days) have elapsed?
5 half lives
What is relative abundance?
How much an isotope occurs in nature
a helium nucleus
alpha particle
How much time has passed for 60g of U-200 to get to 1.875g? Uranium-200 has a half life of 20 years
100 years
Nuclear reaction in which an atom is hit by neutrons and splits into 2
What is nuclear fission
Give another isotope of Oxygen-17
Oxygen-26, oxygen 16, Oxygen- (with any mass.)
released when a neutron splits into a proton that stays and a negative electron is emitted
What is a beta particle
What is the amount of nickel remaining when 10g of nickel-56 (half life is 6 days) undergoes electron capture for 36 days
0.156g
What blocks alpha decay? give all!
skin/sheet of paper
Bromine-90 undergoes 2 beta decays.
Rubidium-90
What is the Average atomic mass of Copper if it has 2 isotopes: Copper-64amu (32.2%) and Copper 63-(67.8%)?Round to hundredths. and show units!
63.32 amu
Charge and mass of gamma radiation
What is neutral and 0
What is the half life of C-16 if it takes 40 days to go from 100% to 25%?
20 days
What blocks Beta Decay? Give all!
Aluminum foil
Carbon-16 goes through an alpha followed by a beta decay.
Boron-12
What is the average atomic mass of Radon if it has 3 isotopes: Radon-220 (13.4%), Radon-219 (1.4%), and Radon-221 (85.2%).Units and round to the hundredths!
220.83amu
What form of decay happens when something lies below the belt of stability?
electron capture or positron emission
Starting mass of C-14 when 100g remains after 24 days if 1 half life is 8 days.
What is 800g C-14
What blocks gamma radiation? give all!
A thick block of lead/concrete
Use the band of stability to figure out what isotope will be made when Polonium-215 undergoes 2 decay reactions.
bismuth- 211
What is the average atomic mass of Silicon if its four isotopes and percent abundance is as follows:
Silicon-28 (30.5%), Silicon-27 (1.1%), Silicon-29 (45%), Silicon-30 (23.4 %). show units and round to the hundreths!
28.91 amu
What type of decay happens when an atom has more than 83 protons?
alpha decay