Percent Abundance
Authored by Shannon Ballard
Chemistry
10th - 12th Grade
NGSS covered
Used 403+ times
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11 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Isotopes of an element have a different number of...
Protons
Neutrons
Electrons
Mass
Tags
NGSS.HS-PS1-8
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Rubidium has two common isotopes, 85Rb and 87Rb. If the abundance of 85Rb is 72.2% and the abundance of 87Rb is 27.8%, what is the average atomic mass of rubidium?
85.468 amu
37 amu
85.6 amu
86.4 amu
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
There are two primary isotopes found in any sample of copper: copper-63 and copper-65. The isotope 65Cu composes 69.2% of the sample and 63Cu comprises the other 30.8%. Based on this data, what is the atomic mass of copper?
29 amu
63.546 amu
64.4 amu
63.6 amu
Tags
NGSS.MS-PS1-1
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
An isotope has three forms. 30% have a mass of 4 amu, 20% have a mass of 5 amu and 50% have a mass of 3 amu. Average atomic mass will be closest to
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Calculate the average atomic mass of silver.
Tags
NGSS.MS-PS1-1
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
An element has two naturally occurring isotopes. One is 10.013 amu and is 19.9% abundant. The other is 11.01 amu and is 80.1% abundant. What is the average atomic mass? What element is it?
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
4.35% of all X atoms have a mass of 39.946 amu. 83.79% have a mass of 41.941 amu, 9.50% have a mass of 42.941 amu, and 2.36% have a mass of 43.939 amu. What is the average atomic mass of atom X?
Tags
NGSS.MS-PS1-1
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