Valence electrons (outermost electrons) are the electrons involved in bond formation.
Now, let’s write the condensed electron configuration of Bi and determine its outermost electrons.
Recall that in a neutral atom:
Atomic number = # of protons = # of electrons
Bi (refer to the periodic table):
Atomic Number = # of e- = 83 e-
Nearest noble gas: Xe
Treating bismuth with fluorine gas forms BiF5. Use the electron configuration of Bi to explain the formation of a compound with this formulation.
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