Chemistry - States of matter, elements, compounds, mixtures

Question 1

Which of the following is an element?

Accepted Answer

A, B

Question 2

Water in a container at room temperature slowly disappears. This is an example of…

Accepted Answer

Evaporation

Question 3

Increasing the temperature of a substance makes its particles move faster. So, temperature is:

Accepted Answer

An indication of the speed of particles

Question 4

When you boil water, some particles quickly turn from liquid to gas because…

Accepted Answer

They have enough energy to break free from other particles

Question 5

Which picture shows a liquid?

Accepted Answer

A

Question 6

What is the chemical symbol for Gold?

Accepted Answer

Au

Question 7

You breathe on the window on a cold morning and see drops of water form. This is...

Accepted Answer

Condensation

Question 8

Which picture shows ONLY a gas?

Accepted Answer

B

Question 9

All of the known elements are organised on the…

Accepted Answer

Periodic table

Question 10

How many atoms are in the molecule H2SO4?

Accepted Answer

7

Question 11

What is the name for changing matter from a liquid to a solid?

Accepted Answer

Freezing

Question 12

Which of the following is a mixture?

Accepted Answer

C

Question 13

Which of these is NOT a metal?

Accepted Answer

Sulphur

Question 14

The definition of matter is…

Accepted Answer

Anything with mass and volume

Question 15

Which of these is NOT a state of matter?

Accepted Answer

Air

Question 16

Elements are organised on the periodic table by increasing…

Accepted Answer

Atomic number

Question 17

What is the chemical symbol for Sodium?

Accepted Answer

Na

Question 18

What is the chemical symbol for Silicon?

Accepted Answer

Si

Question 19

What is the chemical symbol for Nitrogen?

Accepted Answer

N

Question 20

What is the name for changing gas to a liquid?

Accepted Answer

Condensation

Questions 20