because if you were to write PB then it would be a compound not a single element while Pb is lead.
Pb=Lead
The dissolution reaction for lead(II) nitrate, Pb(NO₃)₂, in water can be represented as follows: [ \text{Pb(NO}_3\text{)}_2 (s) \rightarrow \text{Pb}^{2+} (aq) + 2 \text{NO}_3^{-} (aq) ] In this reaction, solid lead(II) nitrate dissociates into lead ions (Pb²⁺) and two nitrate ions (NO₃⁻) when it dissolves in water.
There are 1,024 terabytes (TB) in a petabyte (PB).
lead Latin name plumbum shortened to Pb
The chemical name is lead. The symbol for the element lead is Pb, for plumbum, which comes from Latin for lead.
Pb
In the Penetrant PB B'laster, the PB stands for Penetrating B'laster.
Cellery and PB PB & Jelly Chocolate and PB
Pb is a compound.
Pb , derived from Plumbum.
Lead or Pb ALWAYS has 82 protons.
Pb=Lead
Lead or Pb ALWAYS has 82 protons.
PB Max was created in 1990.
PB Railroad was created in 1974.
PB Railroad ended in 1975.
void swap (int &pa, int &pb) { *pa ^= *pb; *pb ^= *pa; *pa ^= *pb; }