How many neutrons are found in Potassium-39?

• 19

• 20

• 24

• 39

Tags

NGSS.HS-PS1-8

What isotope has 26 protons and 30 neutrons?

• Iron-56

• Zinc-56

• No way to tell

Tags

NGSS.MS-PS1-1

How many protons are in Cs-133?

• 6

• 24

• 55

• 83

Tags

NGSS.MS-PS1-1

How many neutrons are in Argon-40

• 18

• 22

• 33

• 40

Tags

NGSS.MS-PS1-1

An element has 29 protons, 35 neutrons, and 29 electrons. What is the mass number of this element?

• 29

• 35

• 64

• 93

What is the difference between Sulfur-23 and Sulfur-25?

• Sulfur-25 has two more neutrons than Sulfur-23

• Sulfur-25 has two more protons than Sulfur-23

• Sulfur-25 has two more electrons than Sulfur-23

• There is no difference at all

Tags

NGSS.MS-PS1-1

An isotope of Nitrogen has 13 neutrons. What is the identity of this isotope?

• Nitrogen-13

• Aluminum-13

• Nitrogen-20

• Aluminum-20

Tags

NGSS.MS-PS1-1

How many neutrons are in Sodium-20?

• 9

• 11

• 20

• 0

Tags

NGSS.MS-PS1-1

Which isotope has 24 protons and 39 neutrons?

• Chromium-63

• Yttrium-63

Tags

NGSS.MS-PS1-1

Carbon has an average atomic mass of 12.011 on the periodic table. Given this number is the weighted average of all of the isotopes of carbon, what would most likely be the most common isotope of carbon?

• Carbon-10

• Carbon-12

• Carbon-13

• Carbon-14

Tags

NGSS.MS-PS1-1