Ozone is not an element. It is an allotrope of oxygen.
Yes It does it has 1
There is no such plural
CFC's have destroyed the ozone. They react with ozone to deplete it.
Yes, it is. Chlorine reacts with ozone in the form of CFC's.
No. CFC's are chlorofluorocarbons and cause damage to ozone (O3).
The earth has only one ozone layer. It is present in the stratosphere.
The ozone hole is located over Antarctica. It is quite big in size.
The platypus's family group is Ornithorhynchidae.
The group name of antimony is metalloid, and its family name is pnictogen.
No. Indium is in group 13 on the periodic table of the elements. This family (or group) is called the Boron Group.
Group 13 is boron family
See "What can we do to protect the ozone layer?" in the "Related questions" section below.