What is the symbol for Mercury, which is used in some thermometers?

• Hg

• He

• H

• Mn

Uranium provides us with fuel for nuclear power. What is its symbol?

• A) U

• B) Ur

• C) Un

• D) Um

What is the symbol for calcium?

• A) Ca

• B) Cl

• C) C

• D) Cu

Diamonds are made of carbon. What is the symbol for carbon?

• C

• Ca

• Co

• Cr

Some balloons are filled with helium. What is the symbol for helium?

• He

• H

• Hl

• Hm

What is the symbol for oxygen?

• A) O

• B) Ox

• C) Og

• D) On

Germs get killed by chlorine in swimming pools. What is the symbol for chlorine?

• A) Cl

• B) Ch

• C) C

• D) Cr

Our air is 78 percent nitrogen. What is the symbol for nitrogen?

• A) N

• B) Ni

• C) Nt

• D) Ng

Magnesium is found in some heartburn medicine. What is the symbol for magnesium?

• Mg

• Mn

• Ma

• M

Amethyst jewelry is made of silicon. What is the symbol for silicon?

• A) Si

• B) S

• C) Sl

• D) Sn