Question

What value is closest to the mass of the atom?

Answer 1

Answer:

The value closest to the mass of an atom is its mass number. The mass number is the total count of the protons and neutrons in the nucleus of the...

Explanation:

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Answer 2

$\huge\underline\bold\red{♡Answer♡}$

The periodic table is the tabular arrangement of the chemical elements, organized on the basis of their atomic number  (the number of  protons in the nucleus), electron configurations, and recurring chemical properties.

The value of the principal quantum number (n) for the outermost shell or the valence shell indicates a period in the Modern periodic table.