Atomic number, Mass number and Isotopes

Which of the following elements has a mass number of 79?

• Chlorine

• Arsenic

• Sulfur

• Selenium

How many neutrons does the element nickel have?

• 59

• 28

• 31

• 60

Tags

NGSS.MS-PS1-1

Which of the following elements has 13 electrons?

• aluminum

• argon

• arsenic

• actinium

Tags

NGSS.HS-PS1-1

What is the atomic number of titanium?

• 48

• 22

• 26

• 36

Tags

NGSS.MS-PS1-1

How many protons does the element copper have?

• 29

• 64

• 35

• 21

Tags

NGSS.MS-PS1-1

Which of the following elements has the greatest number of protons?

• Bromine

• Zinc

• Sulfur

• Chlorine

Tags

NGSS.HS-PS1-1

Which of the following elements has 30 neutrons?

• Manganese

• Cobalt

• Zinc

• Sulfur

What is the atomic number for tin?

• 50

• 22

• 52

• 73

What is the atomic number for potassium?

• 15

• 19

• 84

• 78

How many electrons does arsenic have?

• 33

• 75

• 18

• 40

Tags

NGSS.MS-PS1-1