Valency of Tennessine (Ts)
The valency of Tennessine is 1 — it has 7 valence electrons, and it loses it to complete its outer shell.
Looking for Tennessine's valency without wading through a whole chapter? Here is the direct answer first, then the tables and derivations examiners want to see. Every number on this page comes from the same engine that powers the interactive table. Need the whole picture instead — history, characteristics, uses, exam questions? The full Tennessine page is one click away.
Counting the valence electrons
From the configuration [Rn] 5f^14 6d^10 7s^2 7p^5, Tennessine's outermost shell carries 7 electrons. These are the electrons shown as dots in electron-dot diagrams — the hands Tennessine uses to hold other atoms.
Position check: Tennessine belongs to group 17 of the periodic table, period 7. For main-group elements in groups 13–18, a quick rule is valency = group number − 10, which gives 7 here.
Valency vs valence electrons
Valence electrons are what you count (7 for Tennessine); valency is what the atom will do to complete its outer shell (1 here). Keep the two words straight and half the periodic-table chapter writes itself.
Students also ask
How do I find the valency of Tennessine from its group?
Tennessine sits in group 17; groups 13–17 follow valency = group − 10, giving 7 (though Tennessine also shows 1).
Why does Tennessine show a fixed valency?
Tennessine has 7 valence electrons and reaches a complete outer shell in one consistent way, so its valency stays fixed at 1.