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K (potassium) belongs to group IA of the periodic table, and has 1 valence electron. Br (bromine) belongs to VIIA, and has

valence electrons.

1 answer

Bromine (Br) belongs to group VIIA of the periodic table and has 7 valence electrons.

So, to summarize:

  • Potassium (K) has 1 valence electron (Group IA).
  • Bromine (Br) has 7 valence electrons (Group VIIA).