What is a period?

• Number of valence electrons

• Orbital levels/energy levels

• elements with similar properties

• Number of elements

How many periods are there in the periodic table?

• 18

• 8A

• 7

• 12

What is a group (also called a family)?

• Number of valence electrons

• Orbital levels/energy levels

• elements with similar properties

• Number of elements

How many valence electrons does sulfur have?

• 16

• 6

• 32

• 15

Which of the following pairs of elements belong to the same period?

• Na and Cl

• Na and Li

• Na and Cu

• Na and Ne

Which of the following pairs of elements belong to the same group?

• H and He

• Li and Be

• C and Pb

• Ga and Ge

What are the Group 1 elements called?

• Halogens

• Alkaline Earth Metals

• Alkali Metals

• Noble Gases

What are the Group 2 elements called?

• Halogens

• Alkaline Earth Metals

• Alkali Metals

• Noble Gases

What are the Group 17 elements called?

• Halogens

• Alkaline Earth Metals

• Alkali Metals

• Noble Gases

What are the Group 18 elements called?

• Halogens

• Alkaline Earth Metals

• Alkali Metals

• Noble Gases