Chemistry, asked by nagrawal108, 1 year ago

Valency of elements of 21-30 atomic number

Answers

Answered by faiqayasmin98

Answer:

all the elements from atomic no. 21-30 have 2 valence electrons with valence shell electronic configuration of ns2(n-1)d except copper and chromium .two electrons in the 4s shell accounts for valency.

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