Question

define isotope..........​

Answer 1

Explanation:

Elements are defined by the number of protons in the atomic nucleus. For example, an atom with 6 protons must be carbon, and an atom with 92 protons must be uranium.

In addition to protons, the atoms of nearly every element also contain neutrons. The mass of a neutron is almost identical to that of a proton. Both are formally given an atomic mass number, A, of 1.The simplest, commonest form of hydrogen has a nucleus that consists of a single proton; it is the only atom with no neutrons: its mass number is 1.

A rarer form of hydrogen known as deuterium has one proton and one neutron: its mass number is 2.

A third form of hydrogen known as tritium has one proton and two neutrons: its mass number is 3.

When an element's atoms have different numbers of neutrons they are said to be isotopes of that element. Three isotopes of hydrogen have been described above

Answer 2

Answer:

The atoms of the same element having the same atomic number but different mass number are called isotopes.

Explanation:

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