The Modern Periodic Table Questions in English

(FALSE) The statement is False.
In the Modern periodic table,the third period consists of elements with atomic numbers $11$ to $18$,which are $Na, Mg, Al, Si, P, S, Cl$ and $Ar$.
$Li$ (Lithium) has an atomic number of $3$ and belongs to the second period,while $F$ (Fluorine) has an atomic number of $9$ and also belongs to the second period.

(TRUE) The statement is True. In the Modern Periodic Table,a zig-zag line (often referred to as the staircase line) effectively separates the metallic elements on the left from the non-metallic elements on the right. The elements lying along this boundary,such as boron $(B)$,silicon $(Si)$,germanium $(Ge)$,arsenic $(As)$,antimony $(Sb)$,tellurium $(Te)$,and polonium $(Po)$,exhibit properties that are intermediate between those of metals and non-metals. These elements are collectively known as metalloids or semimetals.

(A) Hydrogen is the first element in the periodic table with an atomic number of $1$. It is placed at the top of Group $1$ in the modern periodic table.

(B) Sulphur is a non-metal element with the chemical symbol $S$.
Its atomic number is $16$,which represents the number of protons in its nucleus.
Therefore,the correct option is $B$.

(C) The atomic number of sulphur $(S)$ is $16$.
Electronic configuration is determined by filling electrons in shells $(K, L, M, ...)$ according to the rule $2n^2$.
For $n=1$ ($K$ shell): $2(1)^2 = 2$ electrons.
For $n=2$ ($L$ shell): $2(2)^2 = 8$ electrons.
For $n=3$ ($M$ shell): The remaining electrons are $16 - (2 + 8) = 6$ electrons.
Thus,the electronic configuration of sulphur is $2, 8, 6$.