Group 16 THE 'OXYGEN' FAMILY
The group 16 (VI A) elements are oxygen, sulphur, selenium, tellurium and polonium. The first four elements are collectively called CHALCOGENS or ore forming elements, because many metal ores occur as oxides and sulphides.
• Oxygen the most abundant element, is an important
constituent of atmosphere
and ocean. It constitutes 46.6% earth's crust.
• Sulphur is less abundant and occurs in free and
combined states. Sulphur is
also known as Brim stone.
• Polonium, a radioactive element that occurs in
trace amounts in uranium
ores. Its name from Poland, the home country of Marie Curie who
discovered
the element in 1898.
General Trends
Electronic configuration
All of these elements have ns2np4 configuration, just two electrons short of an
octet configuration.
Table Electronic configuration
of Group 16 elements
Oxygen -
Atomic Number : 8
Electronic Configuration : [He] 2s22p4
Group Number : 16 Periodic Number
: 2
Sulphur -
Atomic Number : 16
Electronic Configuration : [Ne] 3s23p4
Group Number : 16 Periodic Number
: 3
Selenium -
Atomic Number : 34
Electronic Configuration : [Ar] 3d10 4s2 4p4
Group Number : 16 Periodic Number
: 4
Tellurium -
Atomic Number : 52
Electronic Configuration : [Kr] 4d10 5s2 5p4
Group Number : 16 Periodic Number
: 5
Polonium -
Atomic Number : 84
Electronic Configuration : [Xe] 4f14 5d10 6s2 6p4 Group Number : 16 Periodic Number : 6
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