What was bohr’s contribution to the planetary model

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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.

Butterfly wingspan is 7.7

Idont know. if you want an answer you need to give us some context dude.