Question

Out of the following statements which is/are correct?
This question has multiple correct options
A.$H$ is an element of minimum atomic radius
B.$He$ is an element of highest I.P.
C.$Cl$ is an element of highest E.A.
D.$Li$ is an element of lowest I.P.

Answer 1

We need to understand the properties of the given elements and accordingly examine the given statements. The elements to be studied are hydrogen, Helium, chlorine and lithium. A thorough study of the periodic table and how they are grouped will help us analyse the given statements one by one.

Complete answer:
The periodic table, commonly known as the periodic table of elements, is a tabular representation of chemical elements organised by atomic number, electron configuration, and repeating chemical characteristics. The table's structure demonstrates periodic patterns. Metals are on the left side of the table's seven rows, termed periods, while non-metals are on the right. The columns, known as groups, include elements with similar chemical properties. Six groups have approved names and numbers: for example, group 17 elements are halogens, while group 18 elements are noble gases. Four basic rectangular regions or blocks are also shown, each linked with the filling of a distinct atomic orbital.
According to trends of the periodic table, the following are observed:
The atomic radius of $H$ is the smallest, whereas the atomic radius of $Fr$ is the largest.
Hence, option A. is correct.
$He$ has the highest ionisation potential because of its tiny size, lack of a screening effect, and high effective nuclear charge.
Hence, option B. is correct.
Because of its tiny size and high nuclear charge, $Cl$ has the highest electron affinity.
Hence, option C. is correct.
$Cs$ has the lowest ionisation potential.
Hence, option D. is incorrect.

Hence, option A. is correct.

Note:
It must be noted that the periodic table's organisation may be used to derive connections between the various element characteristics, as well as to anticipate chemical properties and behaviours of elements that have yet to be found or synthesised. Some debate rages on over the location and categorization of certain parts, the table's potential extension and restrictions, and if there is an ideal form of the table.