M2 Atoms

Two or more _____ that are joined together tightly is called a molecule.

Who was the Greek philosopher who has suggested that everything is made up of tiny pieces of matter which he called atoms more than 2000 years ago?

• Democritus

• Pythagoras

• Isaac newton

• Hercules

Draw a molecule of oxygen gas.

A ________ of sulfur is made up of eight individual sulfur atoms

Many times, the symbol of an element is the _____ letter of the English name of the element.

• last

• first

• middle

• lower case

Draw a molecule of carbon monoxide and a molecule of carbon dioxide. Use different colours when you draw the carbon and oxygen atoms.

What is the common name of the compound sodium chloride?

• sugar

• water

• oil

• salt

If a compound contains a metal, then the name of the metal comes _____ in the name of the compound.

Which three elements are combined in lithium sulfate?

• lithium

  sulfur

  oxygen

• lithium

  gold

  silver

• lithium

  carbon

  iodine

• lithium

  uranium

  copper

Air is a _______ of different elements and compounds.