Discuss the position of He and H in the perio | vedclass

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(C) The position of an element in the periodic table is determined by its electronic configuration. $H$ (Hydrogen) has an atomic number of $1$ and an

Vedclass · Accepted Answer

Hydrogen is placed in group $1$ due to its electronic configuration $1s^1$,while Helium is placed in group $18$ due to its stable noble gas configuration $1s^2$.

Vedclass · Answer

(C) The position of an element in the periodic table is determined by its electronic configuration. $H$ (Hydrogen) has an atomic number of $1$ and an electronic configuration of $1s^1$. Due to its ability to lose one electron like alkali metals or gain one electron like halogens,it is often placed at the top of group $1$. $He$ (Helium) has an atomic number of $2$ and an electronic configuration of $1s^2$. Since its valence shell is completely filled (duplet),it exhibits properties of noble gases and is placed in group $18$.

List-$I$	List-$II$
$(1)$ $Unnilbium$	$(A)$ $Db$
$(2)$ $Unnilennium$	$(B)$ $Lr$
$(3)$ $Unnilpentium$	$(C)$ $Mt$
$(4)$ $Unniltrium$	$(D)$ $Bh$
	$(E)$ $No$
	$(F)$ $Rg$

Discuss the position of $He$ and $H$ in the periodic table.

Similar Questions

Match the elements in List-$I$ with their symbols in List-$II$.

List-$I$ List-$II$

$(1)$ $Unnilbium$ $(A)$ $Db$

$(2)$ $Unnilennium$ $(B)$ $Lr$

$(3)$ $Unnilpentium$ $(C)$ $Mt$

$(4)$ $Unniltrium$ $(D)$ $Bh$

$(E)$ $No$

$(F)$ $Rg$

Which of the following statements is wrong?

What is the position of transition elements from $Sc$ to $Zn$ in the long form of the periodic table?

All elements in the $3^{rd}$ period have:

Write the general outer electronic configuration of $s$-,$p$-,$d$- and $f$-block elements.

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