Average Atomic Mass Assessment

Average Atomic Mass Assessment

12th Grade

20 Qs

quiz-placeholder

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Average Atomic Mass Assessment

Average Atomic Mass Assessment

Assessment

Quiz

Chemistry

12th Grade

Hard

NGSS
HS-PS1-8, HS-PS1-1

Standards-aligned

Created by

CHRISTEL R SPRINKLE

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20 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

Media Image

What does the 1.00794 stand for?

Hydrogen
atomic number
atomic mass
atomic explosion

Tags

NGSS.HS-PS1-1

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the atomic number for an element with three protons?

2
1
3
6

4.

MULTIPLE CHOICE QUESTION

2 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

30 sec • 1 pt

Media Image

If an atom contains exactly three protons, then it's an atom of _____

lithium
gold
nitrogen
carbon

Tags

NGSS.HS-PS1-1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

How many neutrons does the isotope of lithium have?

8
3
4
5

Tags

NGSS.HS-PS1-8

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many neutrons in C-14?

6
7
14
8

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