What values of relative electronegativity are characteristic: a) for metals, b) for non-metals?

What values of relative electronegativity are characteristic:
a) for metals,
b) for non-metals?
How do electrons shift or transfer when a chemical bond is formed between atoms of different elements?

a) For metals, electronegativity is usually less than two b) For non-metals, electronegativity is usually greater than two When a chemical bond is formed, electrons are displaced or transferred to a more electronegative atom.

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