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Chapter 2: Q40E (page 124)

Using the periodic table, identify the heaviest member of each of the following groups:

(a) Alkali metals

(b) Chalcogens

(c) Noble gases

(d) Alkaline earth metals

Short Answer

Expert verified

(a) The heaviest member of the alkali metal group is francium (223Fr87)

(b) The heaviest member of the chalcogens group is polonium (209Po84)

(c) The heaviest member of the Nobel gas group is radon (222Rn86)

(d) The heaviest member of the alkaline earth metal is radium (224Ra88).

Step by step solution

01

Explanation

(a) The last member of alkali group is Fr, so it has most number of protons and neutrons, and hence, it is heaviest.

(b) The last member of chalcogens is Po, so it is heaviest.

(c) The last member of noble gases is Rn, so it is heaviest.

(d) The last member of alkaline earth metal is Ra, so it is heaviest.

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