1.

Assertion (A) : ""_(17)Cl^(35) and ""_(17)Cl^(37) are isotones. Reason (R ) : Atoms of same element have same atomic number but different mass number.

Answer»

(A) are (R ) are CORRECT.(R ) EXPLAIN (A)
(A) is correct (R ) is WRONG
(A) is wrong (R ) is correct
(A) and (R ) are correct. (R ) does not explain (A)

SOLUTION :(A) is wrong (R ) is correct


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