Question

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Answer 1

Answer:

a. ans...

Noble gas, any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic table. The elements are helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og). The noble gases are colourless, odourless, tasteless, nonflammable gases.

b. ans...

Radon due to its radioactive nature is used in treatment of cancer (Radiotherapy)....

c. ans...

The most abundant noble gas in atmosphere is Argon....

d. ans...

Natural gas, which contains an average of 0.4 percent helium, is the major commercial source of helium....

e. ans...

According to the modern view of chemical reactions, bonds between atoms in the reactants must be broken, and the atoms or pieces of molecules are reassembled into products by forming new bonds. Energy is absorbed to break bonds, and energy is evolved as bonds are made....

hope it helps uh...

Explanation:

MissInvisible...✌️

Answer 2

Answer:

(a)Radon is the noble gas obtained as decay product ²

(b)Radon due to its radioactive nature is used in treatment of cancer (Radiotherapy)....

(c)The most abundant noble gas in atmosphere is Argon....

(d)Natural gas, which contains an average of 0.4 percent helium, is the major commercial source of helium....