How many atoms are there in each of the following a) 1.50 mol Na
b) 6.755 mol Pb
c) 7.02 g Si

Non metal is an element or substance that is not a metal metal is a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivitymetalloid is an element (e.g., germanium or silicon) whose properties are intermediate between those of metals and solid nonmetals. they are electrical semiconductors.

Bis the answerhope it !