jumarnanampman jumarnanampman

21-01-2016
Chemistry

contestada

Which element has exactly ﬁve electrons in the highest principal energy level (the outer shell)?
a. B
b. Ba
c. P
d. Mn

Respuesta :

frozenman8888 frozenman8888

21-01-2016

This question is asking for an element with 5 valence electrons. Just go to the row it is in (excluding transition metals) and count over.
The answer would be c. P

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Аноним Аноним

21-01-2016

Phosphorus (P) has 5 valence electrons in its outer shell, meaning, it needs 3 more to become a stable element.

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