The periodic table and molecules

What does the atomic number of an element represent?

• The number of neutrons
  

• The number of electrons in a neutral atom

• The number of protons in the nucleus

• The total number of protons and neutrons

Which group contains the noble gases?

• Group 1
  

• Group 2

• Group 17

• Group 18

Which element does "K" represent? Write your answer in capital letters.

Which of the following elements is a halogen?

• 
  Chlorine
  

• Sodium

• Magnesium

• Oxygen

What are the two rows placed below the periodic table called?

• Alkali and alkaline earth metals
  

• Noble gases and halogens

• Lanthanides and actinides

• Transition metals

What type of elements are located along the “stair-step” line on the periodic table?

• 
  Metalloids
  

• Nonmetals

• Noble gases

• Metals

Which of the following is the most abundant element in the universe?

• Oxygen
  

• Hydrogen

• Carbon

• Helium

Which element has an atomic number of 26? Write your answer in capital letters.

Clue Game: I am a gas in Group 18 with atomic number 2. What am I?

What is a molecule?

• A single atom
  

• Two or more atoms chemically bonded together

• A mixture of different substances

• A type of metal