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Which statement is NOT TRUE about elements in group 16?

a. They need two electrons to complete their octet.
b. They have an oxidation number of 2-
c. They have an oxidation number of 2+
d. The have six valence electrons.

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JoshEast
The most suitable answer is C becuase they would gain two elctrons to atain that stable OCTET thus becoming a anion with a charge of -2 and by virtue oxidation states of -2.  There is however an exception with oxygen in two cases. But I still remain that the best answer would be C

All the statement is true about the elements of group 16.

What is Groups and Periods in Periodic table ?

In periodic table 18 vertical column are present which is called groups which are arranged from left to right in the periodic table.

In periodic table 7 horizontal rows are present which is called periods.

Now lets check all options one by one.

Option (A): They need two electrons to complete their octet.

In periodic table Group sixteen have 6 elements in its valence shell. Group 16 elements needed two electrons to complete the octet valency. The valency of group 16 elements is 2. So it is true about the group 16 elements.

Hence, it is incorrect option.

Option (B): They have an oxidation number of 2-

Group 16 show variable oxidation state that is -2, +2, +4 and +6. So the statement is true.

Hence it is incorrect option.

Option (C): They have an oxidation number of 2+.

Group 16 show variable oxidation state that is -2, +2, +4 and +6. So the statement is true.

Hence it is incorrect option.

Option (D): They have six valence electrons

Group 16 elements are called Chalcogens. They have 6 valence electron so they achieve noble gas configuration. So it is true statement.

Hence, it is incorrect option.

Thus, from the above conclusion we can say that all the statement is true about the elements of group 16.

Learn more about the Group 16 elements here: https://brainly.com/question/19965333
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