Chemistry
Assertion: Noble gases have stable electronic configuration.
Reason: Atoms of elements other than noble gases have incomplete valence shell.
- Both A and R are true and R is the correct explanation of A.
- Both A and R are true but R is not the correct explanation of A.
- A is true and R is false.
- A is false and R is true.
Answer
Both A and R are true but R is not the correct explanation of A.
Reason — A is true as noble gases have completely filled valence shells making them chemically stable.
R is true as except noble gases, other elements do not have completely filled outermost shells.
Therefore, Both A and R are true but R is not the correct explanation of A is the correct option.
Related Questions
With the help of an atomic orbit structure diagram - explain the formation of :
(a) carbon tetrachloride
(b) methane
[at. no. : C=6, Cl=17, H=1]
Explain the formation of a radical from a covalent bond with an example.
An element 'X' has same number of electrons in its first & in its outermost shell. The electronic configuration of X2+ is :
- 2, 8, 1
- 2, 8
- 2, 8, 2
- 2, 8, 8
An element 'A' needs 4 electrons to attain stable electronic configuration of the nearest noble gas — Neon. An element 'B' needs 1 electron to attain stable electronic configuration of the nearest noble gas — Argon.
The covalent compound formed between A & B is :- AB3
- A4B
- A2B4
- AB4