C1.2.1 Elements

What is an element?

• A substance that is made of many smaller substances

• A shiny metal

• A substance that cannot be broken down into other substances

• A type of rock

Fill in the blank: Platinum is a _______ substance that is not damaged by air or water.

• brittle

• shiny

• dull

• fragile

How many elements exist naturally?

• 50

• 92

• 100

• 150

Which element makes up the largest percentage of a 50 kg person?

• Carbon

• Oxygen

• Hydrogen

• Nitrogen

Which of the following is a property of platinum?

• It is brittle

• It is shiny

• It is easily corroded

• It is lightweight.

Fill in the blank: The chemical symbol for chlorine is ____.

• A) Cl

• B) Ch

• C) Cr

• D) Cn

What is the chemical symbol for iron?

• Ir

• Fe

• In

• I

Which element has the chemical symbol 'C'?

• Calcium

• Carbon

• Copper

• Cobalt

Fill in the blank: The chemical symbol for nitrogen is ____.

• A) Ni

• B) N

• C) Nt

• D) Ng

Fill in the blank: The chemical symbol for gold is ____.

• A) Gd

• B) Au

• C) Ag

• D) Go