Elements

Question 1

Many materials can be

Answer 1

broken down into simpler materials

Question 2

breaking down water by

Answer 2

passing electricity

Question 3

The electric current causes

Answer 3

hydrogen gas and oxygen gas to form

Question 4

Element

Answer 4

is a pure substance that cannot be separated into simpler substances by chemical or physical methods.

Question 5

A Pure Substance

Answer 5

is a material in which all the basic particles are the same

Question 6

All pure substances, except for _______________, can be broken down into simpler substances

Answer 6

Elements

Question 7

The basic particles of an element are called

Answer 7

Atoms

Question 8

Elements can be classified based on their properties there are 2 types of properties

Answer 8

Chemical and Physical

Question 9

Physical Properties=

Chemical properties=

Answer 9

Hardness, Melting point, Density, Color, Texture, Electrical and Thermal conductivities

Reactivity with oxygen in the air, Flammability

Question 10

helium and krypton are both

Answer 10

Colorless, Odorless, and Unreactive gases.

Question 11

3 major categories of elements

Answer 11

Metals, Nonmetals, Metalloids

Question 12

Metals tend

Answer 12

to be shiny solids (except mercury, which is a shiny liquid

Question 13

Metals conduct _______________

Answer 13

Electric current and heat well

Question 14

Nonmetals do not

Answer 14

conduct heat or electric current very well.

Question 15

Many nonmetals are

Answer 15

Gases

Question 16

The solid nonmetals have a

Answer 16

Dull appearance

Question 17

Metalloids have some of the _____________________

Answer 17

Properties of metals and some of the properties of nonmetals

Question 18

Metalloids are important in electronics because

Answer 18

their electrical conductivity can vary with conditions