Besides sulphur and chlorine, which other non-metallic element is present in the third period?

Oxygen

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Fluorine

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Nitrogen

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Phosphorus

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Solution

The correct option is D Phosphorus
Phosphorous has electronic Configuration of - 2,8,5 and it requires 3 electrons to complete its octet which gives it a non-metallic character.

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Similar questions

(a) What are metalloids? Name two metalloids.

(b) Classify the following elements into metals,non-metals, and metalloids:

Copper, Sulphur, Aluminium, Oxygen, Silicon, Nitrogen, Germanium, Mercury, Chlorine, and Sodium.

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