Question

the atomic number of element is x is 7 find its valency​

Answer 1

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Element 'X' has atomic no. 7 so its electronic configuration will be 2, 5 . So its electron dot symbol would be ..:X¨⋅.

Electron dot structure - valence electrons are represented by dots placed around the chemical symbol. Electrons are placed up to two on each side of the elemental symbol for a maximum of eight, which is the number of electrons in a filled s and p shell.