All About Isotopes
What is an isotope?
An isotope is an element with the same number of protons as another element but different number of neutrons
What is the average atomic mass of Carbon (C)?
12.011
True or false. The % of all your isotopes should add up to 100%
True
These two particles are found in the nucleus of an atom.
What are neutrons and protons?
Are Ni-59 and Co-59 isotopes of each other? EXPLAIN.
No. Because they have different number of protons.
Where do you find the average atomic mass on the periodic table?
Beneath the symbol/name for the element
Whenever you set up your formula, all of your %'s must be in __________.
For the same element, what number will always be the same?
atomic number AKA the number of protons
What is the isotope notation for an isotope with p=6 and n=8
146C
Calculate the average atomic mass: Fe-54 and 6%, Fe-56 and 92%, & Fe-57 and 2%.
56 amu
Bromine has two isotopes. One makes up 50.69% of all Bromine. What is the other % abundance for the second isotope?
49.31%
Lead has 4 isotopes. Pb-204, Pb-206, Pb-207, Pb-208. On the periodic table lead is 207.02 amu. Which isotope would be the most common? Why?
Pb-207 because the isotope's atomic mass is closest to the average.
What is the isotope notation for an isotope with p=20 and n=20
4020Ca
Calculate the average atomic mass of the element Hydrogen using the following data: Hydrogen-1 has an abundance of 99%, Hydrogen-2 has an abundance of 0.8%, and Hydrogen-3 has the smallest abundance with only 0.2%.
1 amu
x
1-x
Calcium has three different isotopes. One has a mass of 35.00 amu; another has a mass of 41.00 amu; and another has a mass of 40.00 amu. Which isotope is the most abundant of the three?
Isotope 40 is the most abundant because the average atomic mass of Calcium is 40.01.
You find an element that has mass number 88 and 50 neutrons. You find another element with mass number 90 and 38 protons. Are they isotopes? Show the work that led to your answer. (Both your reasoning and your final answer must be correct in order to receive any points)
Yes, they are Strontium isotopes.
1st one has 38 P (88 Mass - 50 Neutrons = 38 protons
2nd one has 38 P (90 Mass - 38 protons = 52 Neutrons)
An element exists as 4 different isotopes. 6.35% have a mass of 49.9461 amu, 85.79%. have a mass of 51.9405 amu, 7.50% have a mass of 52.9407 amu, and 0.36% have a mass of 53.9389 amu.
What is the average atomic mass of this element?What is the identity of this element? (Write it in AZ isotope notation)
5224Cr
Boron's Average atomic mass is 10.81. It has two isotopes. B-10 and B-11. What is the % abundance of each isotope?
(round to the nearest whole number %)
% abundance of B-10: 19%
% abundance of B-11: 81%
There are 7 naturally occurring isotopes of Gadolinium (Gd). The percent abundances of 6 of them are 0.200%, 2.18%, 14.8%, 20.47%, 15.65% and 24.84% What is the percent abundance of the 7th?
21.86% 100% - (0.200+2.18+14.8+20.47+15.65+24.84)%