What is electronegativity

Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons (or electron density). An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The higher the associated electronegativity, the more an atom or a substituent group attracts electrons.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

i think its 100.

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