Question

The electronic configuration of an element x is :
K L M
2 8 6
a) What is the group no. element x in the periodic table?
b) What is the period no. of element x is the period table ?
c) What is the number of valence electrons in an atom of x ?
d) What is the valency of x ?
e) Is the element x, a metal or a non-metal ?

Answer 1

$KLM$

$286$

$\left(a\right)$ Since, it has $6$ valence electrons, it belongs to group no. $16.$

$\left(b\right)$ It has $3$ Valence shells, so it belongs to period no $3.$

$\left(c\right)$ The number of valence electron is $6.$

$\left(d\right)$ The valency of $E$ is $2$ because it requires $2$ electrons to achieve its stability .

$\left(e\right)$ It is a non-metal.