Average Atomic Mass, Isotopes and Ions

Average Atomic Mass, Isotopes and Ions

10th - 11th Grade

27 Qs

quiz-placeholder

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Average Atomic Mass, Isotopes and Ions

Average Atomic Mass, Isotopes and Ions

Assessment

Quiz

Chemistry

10th - 11th Grade

Medium

NGSS
MS-PS1-1, HS-PS1-8, HS-PS2-4

+5

Standards-aligned

Created by

Edward Konstantinov

Used 4+ times

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27 questions

Show all answers

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?

74.92 amu
24.97 amu
75.01 amu
74.51 amu

2.

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?

32
33
34
no way to know

Tags

NGSS.MS-PS1-1

3.

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?

40.00 amu
41.00 amu
35.00 amu
impossible to tell

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?

36.33 amu
37.00 amu
12.11 amu
impossible to tell

5.

MULTIPLE CHOICE QUESTION

30 sec • 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

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

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

2 amu
3 amu
4 amu
5 amu

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?

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

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