Q. 2 B3.5( 15 Votes )
Give a scientific reason for the following
In the atmosphere, Oxygen is available as O2 but not as O.
Answer :
Oxygen has electronic configuration 2, 6. The outer most shell of oxygen has 6 electrons so its valency is 2. It wants to accept two electrons to complete its octet to get stability. So it combines with another oxygen atom to complete its octet. In O2 molecule, both O atoms have a complete octet. So O2 is more stable than O atom. Hence Oxygen is available as O2 in the atmosphere.
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Give a scientific reason for the following
The Valency of noble gases is zero.
Karnataka Board - Science Part IGive a scientific reason for the following
In the atmosphere, Oxygen is available as O2 but not as O.
Karnataka Board - Science Part ISome elements can have different valences. It can happen due to the change in
Karnataka Board - Science Part IAnswer the following
Define:
a) Atomic mass
b) Relative atomic mass
c) Gram molecular mass
d) Mole.
e) Valency of an element
Karnataka Board - Science Part I