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An atom of an element has mass number 31...

An atom of an element has mass number 31. It has 16 neutrons. The valence shell and the number of valence electrons, respectively, could be

A

M-shell and 6 electrons

B

M-shell and 5 electrons

C

N-shell and 5 electrons

D

L-shell and 6 electrons

Text Solution

AI Generated Solution

To solve the problem step by step, we need to find the valence shell and the number of valence electrons for an atom with a mass number of 31 and 16 neutrons. ### Step 1: Understand the relationship between mass number, neutrons, and protons. The mass number (A) of an atom is the sum of the number of protons (P) and neutrons (N). This can be represented by the formula: \[ A = P + N \] ### Step 2: Substitute the known values into the formula. Given: ...
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