Pb is a 2 letter English word.
You can make 5 anagrams from letters in PB (bp).
From the Latin word plumbum
Let P (fig. 2) be the particle and Pb a normal to the surface.
Now, similarly, at Pb the sector B has come around and begins to pass behind P.
Blue and purple unite to form purple-blue (Pb), popularly called violet.
Lead is not a compound, but an element whose chemical symbol is Pb, taken from the Latin name for lead.
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