U.3 -L.2(The Periodic Table)

Elements in Group 1 are:

• Very reactive

• Poor conductors

• Nonmetals

• Completely unreactive

Which group of elements contains unreactive gases?

• Group 1

• Group 7

• Group 18

• Group 2

Why are valence electrons important?

• They determine the element’s color.

• They determine how the atom bonds chemically.

• They determine the element’s weight.

• They determine the element’s conductivity.

Metals are known for which property?

• Being brittle

• Conducting heat well

• Poor electrical conductivity

• Being nonreactive

Nonmetals are:

• Malleable and ductile

• Good conductors of heat and electricity

• Often dull and brittle

• Located to the left of the zigzag line

What happens to atomic size as you move across a period from left to right?

• It increases.

• It decreases.

• It remains constant.

• It fluctuates randomly.