Question

define mass no,isotopes and isotones
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Answer 1

Answer:

mass no : the total number of protons and neutrons in an atom.

isotopes : one of two or more forms of a chemical element that have different physical characteristics but the same chemical characteristics.

isotones : any of two or more species of atoms or nuclei that have the same number of neutrons.

Explanation:

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Answer 2

Explanation:

Mass number: Total number of protons and neutrons in an atom.

Isotopes: one of two or more forms of a chemical elements that have different characteristics but the same chemical characteristics.

Isotones: Isotone, any of two or more species of atoms or nuclei that have the same number of neutrons.

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