Question

an element m as atomic number 12 write it's atomic configuration and valency is m metal metal or non metal give reason​

Answer 1

Answer:

Atomic no=12

Electronic configuration  = 2,8,2

Valency = 2

It is a metal

because elements having 1,2,3 electrons in their outermost shell are metals

Answer 2

Answer: since the atomic no is 12 it is Mg (magnesium)

atomic configuration: 1s^2 2s^2 2p^6 3s^2

valency: 2 (since it has two electrons in its valence shell)

it is a metal because we know all metals when allowed to react with acid they produce salt and and hydrogen gas as product similarly when Mg reacts with HCl it produces magnesium chloride as salt and hydrogen thus we can conclude it as a metal