Question

atom a has mass num 209 and atomic num 82
atom b has mass num 209 and atomic num 88
how many protons does both of these 2 atoms have?
r they isotopes of the same element??????

Answer 1

K, an element is a pure substance which cannot be broken down by chemical means, consisting of atoms which have identical numbers of protons in their atomic nuclei. The number of protons in the nucleus is the defining property of an element, and is referred to as the atomic number.

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