Periodic Table Basics

What is the atomic number of carbon?

• 20

• 30

• 12

• 6

How many groups are there in the periodic table?

• 25

• 18

• 20

• 12

How many periods are there in the periodic table?

• 10

• 7

• 12

• 5

What is the total number of protons in the nucleus of an atom with atomic number 20?

• 30

• 10

• 40

• 20

How many neutrons are there in an atom with mass number 23 and atomic number 11?

• 8

• 12

• 15

• 10

How many electrons are there in a neutral atom with atomic number 8?

• 6

• 8

• 10

• 4

What is the atomic number of an element that has 6 protons and 6 neutrons?

• 12

• 6

• 24

• 18

What is the mass number of an element that has 17 protons and 20 neutrons?

• 30

• 25

• 40

• 37

How many electrons are there in the outermost shell of an atom in period 3 and group 15?

• 5

• 10

• 8

• 2

What is the atomic mass of hydrogen?

• 1.008 u

• 2.002 u

• 1.007 u

• 1.000 u