Question

Name the Elements and No of Neutrons in the symbol X 40 & 18​

Answer 1

Answer:

properly tell the question . if u don't mind

Answer 2

Answer:

    The mass number is the sum of protons and neutrons. This means to find the number of neutrons you subtract the number of protons from the mass number. On the periodic table, the atomic number is the number of protons, and the atomic mass is the mass number.

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