The valence of the chlorine atom is one.
The element that has 7 valence electrons in its third shell is chlorine. The electronic configuration of chlorine is 2, 8, 7, with the outermost shell containing 7 electrons.
Technetium valences are between -1 and +7; the most usual valences are +3, +4 and +7.
6
1
No. Radicals have unsatisfied valences.
If by valences, you mean valence electrons, chromium has 6, lithium has 1, carbon has 4, and sulfur has 6. If by valences, you mean valence electrons, chromium has 6, lithium has 1, carbon has 4, and sulfur has 6.
The valences of polonium are 2, 4 and 6.
2 valence electrons
Neptunium has valences from +3 to +7.
Valences of fermium are +2 and +3.
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Berkelium has the valences 3+ and 4+.