Elements and Gases Quiz

Question 1

Which gas turns limewater cloudy?

Accepted Answer

Carbon dioxide

Question 2

What is the mass number of an atom with 6 protons, 6 neutrons, and 6 electrons?

Accepted Answer

12

Question 3

What is THE lightest gas?

Accepted Answer

Hydrogen

Question 4

What is the test for oxygen gas?

Accepted Answer

It relights a glowing splint.

Question 5

What is the chemical formula for water?

Accepted Answer

H₂O

Question 6

What is the name of a mixture of gases that we breathe?

Accepted Answer

Air

Question 7

What is Element Symbol W commonly used for?

Accepted Answer

Light bulb filaments.

Question 8

Which gas is produced when calcium carbonate reacts with hydrochloric acid?

Accepted Answer

Carbon dioxide

Question 9

What is the most abundant gas in the air?

Accepted Answer

Nitrogen

Question 10

Which metal is used to make aircraft because of its low density?

Accepted Answer

Aluminium

Question 11

Slightly silly: What is the symbol for the element of surprise?

Accepted Answer

Ah!

Question 12

Which element is used to disinfect drinking water and swimming pools?

Accepted Answer

Chlorine

Question 13

What do isotopes of the same element have?

Accepted Answer

The same number of protons but different numbers of neutrons.

Question 14

What is the atomic number of carbon?

Accepted Answer

6

Question 15

Which gas is produced when hydrochloric acid reacts with magnesium?

Accepted Answer

Hydrogen

Questions 15