Question

element A have atomic number 7 mass number 14, element B have electronic configuration 2 ,8, 8 ,element C have electron 13 neutron 14 ,elements D Have Proton 18 neutron 22, element E have electronic configuration 2 ,8, 8, 1. i. the valency of element ABCD is what .ii. which of the above element is a metal iii. which are the of element is a non metal . iv. which of the above element is a noble gas​

Answer 1

Answer:

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