Q.

Assertion (A): Isotopes are electrically neutral.

Reason (R): Isotopes are species with same mass number but different atomic number

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a

(A) is false but (R) is true

b

Both (A) and ® are true, but (R) is not the correct explanation for (A)

c

(A) is true, but (R) is false

d

Both (A) and (R) are true and (R) is the correct explanation for (A)

answer is C.

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Detailed Solution

Isotopes are electrically neutral because they possess an equal number of protons and electrons.

 Isotopes are the atoms of same element which have same atomic number but different mass numbers.

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