Unit 9: The Periodic Table of Elements

How many elements are there in the first period of the periodic table?

• 1

• 2

• 8

• 18

Using the periodic table, what is the atomic number of carbon?

• 2.4

• 6

• 7

• 12

What period and group does sodium (Na) belong to?

• period 3, group 1B

• period 3, group 1

• period 1, group 3

• period 3, group s

Which element has an atomic mass of approximately 40 and is located in Period 4?

• calcium

• potassium

• argon

• chlorine

Identify the block of elements where Neon (Ne) is found.

• s-block

• p-block

• d-block

• f-block

Refer to the periodic table diagram below. Which color represents nonmetals?

• Green

• Orange

• Blue

Is hydrogen a metal, nonmetal, or metalloid?

• Nonmetal

• Metal

• Metalloid

• Noble gas

What are the three ways elements are grouped in the periodic table?

• Groups, periods, and blocks

• Metals, nonmetals, and metalloids

• Rows, columns, and families

• Atomic number, atomic mass, and density

Refer to the periodic table diagram. Which element is in Group 1, Period 2?

• H

• Li

• Na

• K

According to the passage, what are vertical clusters of elements in the periodic table called?

• Groups or families

• Periods

• Blocks

• Rows