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An atom has a configuration of …

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An atom has a configuration of 2,8.7.What is the atomic number of the element? Justify

Posted by Anurag Singh 4 years, 6 months ago

CBSE > Class 10 > Science

3 answers

Sia ? 4 years, 6 months ago

The number of electrons present in an atom is

⇒ 2+8+7 = 17.

Therefore, the atomic number of this element is 17 and the element is chlorine.

Cl (Z = 17) = 1s² 2s² 2p⁶ 3s² 3p⁵

Tarunpreet Singh💯💯 4 years, 6 months ago

17

Satyam Suman 4 years, 6 months ago

17

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