Kids Science: Molecules Quiz

What is a molecule?

• A single atom

• Two or more atoms joined together

• A type of chemical reaction

• A form of energy

What is a compound?

• A single atom

• A type of chemical bond

• A molecule made of different types of elements

• A molecule made of the same type of atoms

What is the molecular formula for water?

• CO2

• H2O

• C6H12O6

• NH3

How many hydrogen atoms are in a water molecule?

• 3

• 1

• 4

• 2

What type of bond shares electrons between atoms?

• Covalent bond

• Ionic bond

• Hydrogen bond

• Metallic bond

What type of bond involves one atom donating an electron to another?

• Ionic bond

• Metallic bond

• Hydrogen bond

• Covalent bond

What is the molecular formula for carbon dioxide?

• H2O

• C6H12O6

• CO2

• NH3

What percentage of the human body's mass is made up of oxygen atoms?

• 66%

• 75%

• 50%

• 33%

What is the molecular formula for glucose?

• H2O

• CO2

• NH3

• C6H12O6

What is a perfect diamond made of?

• Carbon atoms

• Nitrogen atoms

• Hydrogen atoms

• Oxygen atoms