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Alchemy Quiz 10

Authored by Linda Anderson

Science

8th Grade

NGSS covered

Used 517+ times

Alchemy Quiz 10
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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Lithium has an atomic number of 3 and an average atomic mass of 6.941 amu. Which isotope would you find in the greatest abundance for lithium?

lithium-7

lithium-4

lithium-6.95

lithium-6.9

lithium-6

Answer explanation

If you round the average atomic mass to the nearest whole number, you will get the mass number of the most common isotope.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

In the isotope symbols shown below, what does the number on the left above the “C” represent?

number of protons

number of neutrons

atomic number

mass number

Answer explanation

Media Image

Tags

NGSS.MS-PS1-1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What is different about the three different isotopes shown?

number of nuclei

number of protons

number of neutrons

number of electrons

Answer explanation

Atoms of the same element all have the same number of protons and electrons. What accounts for the differences in mass numbers?

Tags

NGSS.MS-PS1-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Calcium has an atomic number of 20. What is the correct isotope symbol for calcium-44?

A

B

C

D

Answer explanation

Media Image

Tags

NGSS.MS-PS1-1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Isotopes of the element uranium have different:

numbers of protons.

numbers of electrons.

atomic numbers.

atomic masses.

Answer explanation

Media Image

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The number of neutrons most likely to be found in a boron atom (#5) is:

3

5

6

11

Answer explanation

#neutrons = mass # - #protons

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

A deuterium atom has one neutron and a mass of ____ amu.

1

2

3

4

Answer explanation

Mass # = # protons + # neutrons

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