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2 February, 15:00

13. How many valence electrons does an atom

with 5 electrons, 5 neutrons, and 5 protons

have in its ground state?

A. 5

B.

4.

C.

D.

3

2

+5
Answers (1)
  1. 2 February, 16:36
    0
    The answer to your question is: 3

    Explanation:

    If an atom has 5 electrons, 5 neutrons and 5 protons, it means that the element is Boron. Boron is situated in the third group A, that means that is has 3 elements in its outermost shell.

    Also, if we do the electronic configuration:

    1s² 2s²2p¹

    If we count the number of electron in the second level of energy, the result will be: 2 in s and 1 in p = 3. Those are the valence electrons.
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