Isotopes of the same element have

Q. Isotopes of element have_______.

(A) different atomic number and different atomic mass.
(B) different atomic numbers but the same mass number.
(C) the same atomic number but different mass number.
(D) the same atomic number and same mass number
[1 Mark]

Q. Assertion :The mass spectrometer is used for determination of the atomic mass of isotopes.
Reason: Isotopes are the atoms of the same element having a same atomic number but different mass numbers.

Q. ............... of an element are the atoms of same element having same atomic number but different mass number.

Q. Assertion: Isotopes are electrically neutral
Reason: Isotopes are species with same mass number but different atomic number