Quiz about Chemical

Question 1

Which of the following represents an element?

Accepted Answer

H

Answer

H2O

Answer

NaCl

Answer

CaCO3

Question 2

Salt has a chemical formula of NaCl.  Salt is a...

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

None of the Above

Question 3

What is made up two or more elements that are chemically combined?

Accepted Answer

Compound

Answer

Element

Answer

Mixture

Answer

Solids

Question 4

How many elements are represented in the compound?
Na₂CO₃

Accepted Answer

3

Answer

1

Answer

2

Answer

4

Question 5

An element is made up of only one kind of _____.

Accepted Answer

atom

Answer

isotope

Answer

plastic

Answer

metal

Question 6

COPPER

Accepted Answer

Cu

Answer

C

Answer

Ca

Answer

Cl

Question 7

The chemical symbol for Helium is

Accepted Answer

He

Answer

H

Answer

Hg

Answer

O

Question 8

Is the following an element or compound: CaCO₃?

Accepted Answer

Compound

Answer

Element

Answer

Both

Answer

Neither

Question 9

When two or more elements chemically combine

Accepted Answer

compound

Answer

element

Answer

mixture

Answer

solution

Question 10

Compounds are represented by a...

Accepted Answer

Chemical formula

Answer

Capital Letter

Answer

Chemical symbol

Answer

Chlorine

Question 11

Compounds are different than elements because compounds are -

Accepted Answer

A combination of two or more elements.

Answer

B)not able to be broken down into parts

Answer

made from the same type of atoms

Answer

a pure substance, elements are not

Question 12

Two clear liquid chemicals are mixed and a solid substance forms, this is an example of what?

Accepted Answer

Precipitate

Answer

Temperature change

Answer

Gas production

Answer

Odor change

Question 13

Which of the following examples shows that a chemical reaction has occurred?

Accepted Answer

Rust forms on a hammer that has been left outside to long.

Answer

A rock breaks into smaller pieces when it is struck with a hammer.

Answer

A cup of water turns pink when a few drops of red food coloring are added.

Answer

A solid is formed when heat is removed from a sample of water.

Question 14

Four students performed four different investigations by combining different substances. Their results are shown in the table provided. In which experiment is there signs of a chemical change?

Accepted Answer

Experiment 1

Answer

Experiment 2

Answer

Experiment 3

Answer

Experiment 4

Question 15

What does C in the element carbon represent on the periodic table?

Accepted Answer

chemical symbol

Answer

atomic mass

Answer

atomic number

Answer

element name

Question 16

Which one can be found on the periodic table?

Accepted Answer

Element

Answer

Compound

Question 17

What do all chemical symbols have?

Accepted Answer

one upper case letter

Answer

one lower case letter

Answer

one number

Answer

two letters

Question 18

Is hammering wood together to build a house a chemical or physical change?

Accepted Answer

physical

Answer

chemical

Question 19

Is melting butter for popcorn a chemical or physical change?

Accepted Answer

physical

Answer

chemical

Question 20

Which of the following is a sign that a chemical reaction has occurred?

Accepted Answer

formation of a gas

Answer

change in shape

Answer

melting

Answer

dissolving

Question 21

Photosynthesis is an example of a

Accepted Answer

chemical change

Answer

physical change

Question 22

When you break a cracker into pieces it is a

Accepted Answer

Physical change

Answer

Chemical change

Answer

Chemical Weathering

Answer

Physical Weathering

Question 23

Is burning wood a chemical or physical change?

Accepted Answer

chemical

Answer

physical

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