Which of the following pairs of elements belo | vedclass

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(A) Representative elements are those elements that belong to the $s$-block and $p$-block of the periodic table (excluding noble gases in some definit

Vedclass · Accepted Answer

$Al$ and $Mg$

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(A) Representative elements are those elements that belong to the $s$-block and $p$-block of the periodic table (excluding noble gases in some definitions,but generally including groups $1, 2, 13-17$).$Al$ (Aluminum) is in group $13$ ($p$-block) and $Mg$ (Magnesium) is in group $2$ ($s$-block).Both $Al$ and $Mg$ are representative elements.$Cr$ and $Zn$ are transition elements ($d$-block).$Ag$ is a transition element and $At$ is a halogen (representative).$La$ and $Th$ are inner transition elements ($f$-block).Therefore,the correct pair is $Al$ and $Mg$.

Which of the following pairs of elements belongs to the group of representative elements in the periodic table?

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