Quiz about Composition of Molecules Review

Question 1

Which of these are pure substances?

Accepted Answer

Diagrams I and III

Answer

Diagram I only

Answer

Diagram III only

Answer

Diagrams II and IV

Question 2

Diagram I represents:

Accepted Answer

an element

Answer

a compound

Answer

a mixture

Question 3

Diagram III represents:

Accepted Answer

a compound

Answer

an element

Answer

a mixture

Question 4

The particles in Diagram II are:

Accepted Answer

atoms and molecules

Answer

atoms only

Answer

molecules only

Question 5

The particles in Diagram III are:

Accepted Answer

molecules only

Answer

atoms only

Answer

atoms and molecules

Question 6

The particles in Diagram I are:

Accepted Answer

atoms only

Answer

molecules only

Answer

atoms and molecules

Question 7

The three particles shown here are examples of:

Accepted Answer

molecules of an element

Answer

atoms of an element

Answer

atoms of a compound

Answer

molecules of a compound

Question 8

The ten particles shown here are examples of:

Accepted Answer

molecules of a compound

Answer

atoms of an element

Answer

atoms of a compound

Answer

molecules of an element

Question 9

Which of these is the chemical symbol of a diatomic element?

Accepted Answer

F

Answer

Fe

Answer

C

Answer

B

Question 10

Which of these is the name of a diatomic element?

Accepted Answer

nitrogen

Answer

carbon

Answer

helium

Answer

beryllium

Question 11

Which of these is the chemical symbol of a noble gas element?

Accepted Answer

He

Answer

H

Answer

N

Answer

Al

Question 12

What is the total number of atoms in one molecule of the compound C₂H₄O₂ ?

Accepted Answer

8

Answer

2

Answer

4

Answer

3

Question 13

How many elements are found in the compound with the chemical formula Na₂CO₃ ?

Accepted Answer

3

Answer

1

Answer

2

Answer

6

Question 14

How many oxygen (O) atoms are found in one molecule of Cu₃(PO₄)₂ ?

Accepted Answer

8

Answer

2

Answer

4

Answer

6

Question 15

Look at your periodic table.

The name of the element with the atomic number 47 is:

Accepted Answer

silver

Answer

Ag

Answer

Group 11

Answer

titanium

Question 16

In this model, each ball represents an atom.

How many atoms make up one of these molecules?

Accepted Answer

10

Answer

3

Answer

6

Answer

1

Question 17

What is the chemical formula for the molecule shown here?

Accepted Answer

NH3

Answer

NH

Answer

HN3

Answer

N3H3

Question 18

What type of pure substance is pictured here?

Accepted Answer

polymer compound

Answer

crystal compound

Answer

element with extended structure

Answer

diatomic element

Question 19

Which type of pure substance is made up of atoms that do not like to bond with any other atoms?

Accepted Answer

noble gas

Answer

diatomic element

Answer

polymer compound

Answer

crystal compound

Question 20

Which type of pure substance is made up of pairs of identical atoms bonded together?

Accepted Answer

diatomic element

Answer

noble gas

Answer

polymer compound

Answer

crystal compound

Question 21

Which state of matter would a bulk substance with this composition probably be found in?

Accepted Answer

solid

Answer

liquid

Answer

gas

Question 22

Which state of matter would a bulk substance with this composition probably be found in?

Accepted Answer

gas

Answer

solid

Answer

liquid

Question 23

How are crystals and polymers similar? (Check ALL correct answers.)

Accepted Answer

they both have extended structures

Accepted Answer

they are not made of a set number of atoms

Answer

they are only made of one type of element

Answer

they both grow in every direction

Question 24

Which of these could be the chemical symbol of a single imaginary element?

(Imaginary! None of them can be found on the periodic table.)

Accepted Answer

Gk

Answer

GK

Answer

gk

Answer

gK

Question 25

Check ALL the statements that are true.

Accepted Answer

Crystals structures extend in all three dimensions.

Accepted Answer

Polymer structures extend in chains.

Answer

Crystal structures extend in chains.

Answer

Polymer structures extend in all three dimensions.

Question 26

What type of pure substance is pictured here?

Accepted Answer

element with extended structure

Answer

crystal compound

Answer

polymer compound

Answer

diatomic element

Question 27

What state of matter is a material with this structure likely to be found in under normal conditions?

Accepted Answer

solid

Answer

liquid

Answer

gas

Question 28

What state of matter is a material with this structure likely to be found in under normal conditions?

Accepted Answer

gas

Answer

solid

Answer

liquid

Question 29

Why does solid water (ice) have a lower density than liquid water?

Accepted Answer

Ice has a crystal structure that spaces the particles out.

Answer

Ice has a polymer structure that spaces the particles out.

Answer

The particles in ice are moving faster than the particles in water.

Answer

When ice melts, its particles get farther apart.

Composition of Molecules Review

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