Question

anawer this don't answer something and all​

Answer 1

Explanation:

i)1s2 2s2 2p6 3s2

iii)anions are negative charged atom A is anion

iv)C is mettaloid

v)B and E because diff no. of neutrons

vi)Na2CO3=Na2O +CO2

vii) C is acidic oxide so it turn blue to red

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