GK
ELEMENTS COMPOUNDS SUBSTANCES METALS AND NON METALS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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C
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O
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N
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Na
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Detailed explanation-1: -Nitrogen has five electrons in its valence shell.
Detailed explanation-2: -Detailed Solution Examples of metal are-: Iron, copper, zinc, etc.
Detailed explanation-3: -Sodium belongs to group I which are metallic elements while Cl, C and F all are non-metals.
Detailed explanation-4: -Sodium is a soft metal that tarnishes within seconds of being exposed to the air. It also reacts vigorously with water. Sodium is used as a heat exchanger in some nuclear reactors, and as a reagent in the chemicals industry.
Detailed explanation-5: -Sodium is a metal because it is a good conductor of electricity, malleable and ductile. It can lose electrons easily from the valence shell whereas carbon is a bad conductor of electricity, not lustrous or malleable.