Page 238 - Science Course 1 (Book 1)

Periodic Table: Nonmetal and Metalloids Mo6-L6a: What are Nonmetals?
Lesson 6

Nonmetals are elements Oxygen 65%
In this topic, you will learn the following that have no metallic
lessons: properties.
Mo.6-L6a: What are Nonmetals?
Mo.6-L6b: What are Halogens and Noble Gases? The four elements that
Mo.6-L6c: What Elements are Metalloids? make up most of the
human body, along with
phosphorus and sulfur,
are the six elements in
Mo6-L6a What are Nonmetals? proteins, fats, nucleic a
cids, and other large mol-
ecules in your body and in Carbon 18.5%
KEY CONCEPTS: all other living things.
1. What properties do nonmetals have?

Hydrogen 9.5%

Nitrogen 3.3%
Vocabulary A-Z
Let us learn some vocabulary Other elements 3.7%

Nonmetal

an element that has no metallic properties How are nonmetals different from metals?
Nonmetals have properties that are different from
Nonmetal those of metals.

Many nonmetals are gases at room temperature
and those that are solid at room temperature have a
dull surface, which means they have no luster.

Because nonmetals are poor conductors of
electricity and thermal energy, they are good
insulators.

Let’s Begin

The Elements of Life
More than 96 percent of the
mass of the human body
comes from four nonmetals–
oxygen, carbon, hydrogen, and
nitrogen.

231