
Average Atomic Mass
Quiz
•
Chemistry
•
11th Grade
•
Medium
Standards-aligned
April Harris
Used 6+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 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?
74.92 amu
75.00 amu
25 amu
24.9733 amu
2.
MULTIPLE CHOICE QUESTION
5 mins • 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.MS-PS1-1
3.
MULTIPLE CHOICE QUESTION
5 mins • 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?
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
An element with 4.35% have a mass of 49.9461 amu, 83.79% have amass of 51.9405 amu, 9.50% have a mass of 52.9407 amu, and 2.36% have a mass of 53.9389amu.
51.9959 amu
52.996 amu
12.999 amu
17.33 amu
5.
MULTIPLE CHOICE QUESTION
5 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
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Calculate the average atomic mass of silver.
106.38649amu
111.91896amu
107.86770amu
121
7.
MULTIPLE CHOICE QUESTION
5 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?
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