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Average Atomic Mass

Authored by Rory Sheats

Science

10th Grade

NGSS covered

Used 66+ times

Average Atomic Mass
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6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Calculate the average atomic mass of silver.

106.38649amu

111.91896amu

107.8677amu

121

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Compute the average atomic mass for silicon:

27.977
28.09
28.976
The average mass cannot be determined from provided information.

3.

MULTIPLE CHOICE QUESTION

3 mins • 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

2 amu
3 amu
4 amu
5 amu

4.

MULTIPLE CHOICE QUESTION

3 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
24.97 amu
75.01 amu
74.51 amu

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

Media Image

Magnesium exists as the three isotopes shown. What is the average atomic mass of magnesium?

20.74 amu

22.56 amu

18.39 amu

24.31

Tags

NGSS.HS-PS1-8

6.

MULTIPLE CHOICE QUESTION

3 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.

51.99 amu
52.19 amu
53.45 amu
17.33 amu

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