Occurrence, Physical properties | p-Block Elements-II | Chemistry - Group 16 (Oxygen group) elements | 12th Chemistry : UNIT 3 : p-Block Elements-II
Chapter: 12th Chemistry : UNIT 3 : p-Block Elements-II
Group 16 (Oxygen group) elements
Group
16 (Oxygen group) elements:
Occurrence:
Elements belonging group
16 are called chalgogens or ore forming elements as most of the ores are oxides
or sulphides. First element oxygen, the most abundant element, exists in both
as dioxygen in air (above 20 % by weight as well as volume) and in combined
form as oxides. Oxygen and sulphur makes up about 46.6 % & 0.034 & of
earth crust by weight respectively. Sulphur exists as sulphates (gypsum, epsom etc...)
and sulphide (galena, Zinc blende etc...). It is also present in the volcanic
ashes. The other elements of this groups are scarce and are often found as
selenides, tellurides etc... along with sulphide ores.
Physical properties:
The common physical
properties of the group 16 elements are listed in the Table.
Table 3.2 Physical properties of group 16 elements
Related Topics