Page 240 - Science Course 1 (Book 1)

Mo6-L6b: What are Halogens and Noble Gases?

Mo6-L6b What are Halogens and Noble Let’s Begin
Gases?

KEY CONCEPTS: How are nonmetals different from metals?
1. What is the difference between halogens and noble An element in group 17 of the periodic table is called
gases?
a halogen.

F
Vocabulary A-Z Flourine
Let us learn some vocabulary
Cl
Chlorine
Halogen The term halogen refers to an
Br
an element in group 17 on the periodic Bromine element that can react with a
metal and form a salt.
table.
I
Iodine

At

Halogens react readily with other elements and form
compounds.

Halogens can only occur naturally in compounds.
In general, halogens are less reactive as you move
down the group.

Most
Noble Gas F Reactive
Flourine
an element in group 18 on the
periodic table.
Cl
Chlorine

Br
Bromine

I
Iodine Least
Reactive

The elements in group 18 are known as the noble
gases.
18
Noble Gases

233