Calculate Average Atomic Mass

Calculate Average Atomic Mass

10th Grade

10 Qs

quiz-placeholder

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Calculate Average Atomic Mass

Calculate Average Atomic Mass

Assessment

Quiz

Chemistry

10th Grade

Medium

NGSS
HS-PS1-7

Standards-aligned

Created by

Charles Martinez

Used 1+ times

FREE Resource

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

15 mins • 1 pt

Media Image

Calculate the average atomic mass of silver.

106.38649amu

111.91896amu

107.8677amu

121

2.

MULTIPLE CHOICE QUESTION

15 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?
9.012, Beryllium
12.011, Carbon
6.941, Lithium
10.812, Boron

3.

MULTIPLE CHOICE QUESTION

15 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.

4.

MULTIPLE CHOICE QUESTION

15 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

5.

MULTIPLE CHOICE QUESTION

15 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

6.

MULTIPLE CHOICE QUESTION

15 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?
41.97 amu
42.19 amu
10.43 amu
40.04 amu

Tags

NGSS.HS-PS1-7

7.

MULTIPLE CHOICE QUESTION

15 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

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