Which of the following carbohydrates is not found in plants? c)cohlose d)eycogen c) amylopectin b) amylose a)starch

Copper, silver, aluminum, cobalt, chromium, mercury 

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.

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.