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Answer 1

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Quest-12

Common name for Isotopes of Hydrogen

• Protium ( Contain One proton)
• Deuterium(Contains 1 proton and 1 neutron)
• Tritium( Contain 1 proton and 2 neutron)

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Quest-14

• a) By gaining 3 electrons
• b)The magnesium ion Mg2+ is formed when the magnesium atom loses the two electrons from its outer shell

Ques-15

• a) 1. Element P is the metal name magnesium ( Mg)
• a) 2. Magnesium (Mg), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table, and the lightest structural metal.
• b) Elements Q and R are not metals they isotopes of chlorine which is a non- metal

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Answer 2

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