Calculate the following to four significant figures:
(a) the percent composition of ammonia, nh3
(b) the percent composition of photographic "hypo," na2s2o3
(c) the percent of calcium ion in ca3(po4)2

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.

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