Question

different isotopes of an element are found in the following percentage:90%,0.3%and90.7% . if the masses of the isotopes are22, 21 and 20 respectively, what is the atomic mass of X​

Answer 1

Explanation:

Neutral atoms have the same number of electrons and protons. Atoms of an element that contain different numbers of neutrons are called isotopes. Each isotope of a given element has the same atomic number but a different mass number (A), which is the sum of the numbers of protons and neutrons.