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An element with 7 valence electrons would be a
O + 7 cation
0 - 1 anion
0 - 7 cation
O + 1 anion


Sagot :

Answer:

The Group 7A elements have seven valence electrons in their highest-energy orbitals (ns2np5). This is one electron away from having a full octet of eight electrons, so these elements tend to form anions having -1 charges, known as halides: fluoride, F-; chloride, Cl-, bromide, Br-, and iodide, I-.

...

Group 7A — The Halogens.

(7)

(8)

(9)

(10)

Explanation:

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