Average Atomic Mass
Science
10th Grade
NGSS covered
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13 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
What is the average mass of this element?
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
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?
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
24.1% of all the isotopes of a an element have a mass of 75.23 amu, 48.7% have a mass of 74.61 amu, and 27.2% have a mass of 75.20 amu.
How many protons does this element have?
Tags
NGSS.HS-PS1-8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An element has three different isotopes. One has a mass of 35.00 amu; another has a mass of 36.00 amu; and another has a mass of 38.00 amu. What is the average atomic mass of this element?
5.
MULTIPLE CHOICE QUESTION
30 sec • 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?
6.
MULTIPLE CHOICE QUESTION
30 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
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Calculate the average atomic mass of silver.
Tags
NGSS.HS-PS1-7
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