Question

'X'is an element with atomic number 20 .whether it is metal or non-metal why ?​

Answer 1

Answer:

1 Answer. Since it has 2 valence electrons in its valence shell and it will lose 2 electrons to gain nearest stable gas configuration. So, the valency of X is 2. (b) Since it loses electrons to gain inert gas configuration, so it is a non-metal

Explanation:

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Answer 2

Answer:

calcium

Explanation:

calcium is the element with atomic number 20