Question

Give reasons
(a) Isotopes have different mass numbers.
(b) Isotopes are electrically neutral.​

Answer 1

Answer:

a)Isotopes are atoms of the same element that have different numbers of neutrons but the same number of protons and electrons. The difference in the number of neutrons between the various isotopes of an element means that the various isotopes have different masses.

b)Isotopes are electrically neutral because they possess an equal number of protons (+) and electrons (-). Isotopes are electrically neutral because they possess an equal number of protons (+) and electrons (-). The most common version is C-12 (6p, 6n, 6e) whose mass of 12amu comes from the 6 protons and 6 neutrons.

Explanation:

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Answer 2

Answer:

(a) Isotopes of an element differ in the number of neutrons in the nuclei so they have a different mass number as the mass number is not sum of a number of protons and neutrons in the nucleus.

(b) Isotopes are electrically neutral because they possess an equal number of protons (+) and electrons (-).