5th Grade Science - Elements

What is an element?

• A substance that cannot be broken down into simpler substances by chemical means.

• A substance that can be broken down into simpler substances by physical means.

• A substance that is composed of only one type of atom.

• A substance that can be broken down into simpler substances by chemical means.

How many elements are there in the periodic table?

• 92

• 100

• 110

• 118

What is the atomic number of carbon?

• 2

• 8

• 12

• 6

Name one element that is a liquid at room temperature.

• Mercury

• Iron

• Oxygen

• Water

What is the symbol for gold?

• Au

• Cu

• Fe

• Ag

What is the atomic mass of oxygen?

• 16.00

• 18.00

• 17.00

• 15.00

What is the most abundant element in the Earth's atmosphere?

• Nitrogen

• Carbon dioxide

• Oxygen

• Helium

What is the atomic symbol for helium?

• Ne

• H

• O

• He

What is the atomic number of hydrogen?

• 2

• 3

• 4

• 1

Name one element that is a metalloid.

• Carbon

• Oxygen

• Iron

• Silicon