Valency of Bohrium (Bh)
The valency of Bohrium is 2 — it has 2 valence electrons, and it loses them to complete its outer shell.
Teachers call it "one fact, fully handled" — exactly what this page does for Bohrium. The answer sits at the top in bold; scroll for the working, the shell-by-shell breakdown and the two questions students ask most. Need the whole picture instead — history, characteristics, uses, exam questions? The full Bohrium page is one click away.
Counting the valence electrons
From the configuration [Rn] 5f^14 6d^5 7s^2, Bohrium's outermost shell carries 2 electrons. For a d-block element the nearby inner "d" subshell can also lend electrons, which is where variable valency comes from.
Position check: Bohrium belongs to group 7 of the periodic table, period 7.
Valency vs valence electrons
Valence electrons are what you count (2 for Bohrium); valency is what the atom will do to complete its outer shell (2 here). Keep the two words straight and half the periodic-table chapter writes itself.
Students also ask
How do I find the valency of Bohrium from its group?
Bohrium sits in group 7; for this transition group the safe exam answer is its common valency, 2.
Why does Bohrium show a fixed valency?
Bohrium has 2 valence electrons and reaches a complete outer shell in one consistent way, so its valency stays fixed at 2.