Question

in an atom electrons are completely filled in K, L, M . identify the name if the element from the following
(a) K
(b) Ca
(c) Cl
(d) Ar​

Answer 1

Answer:-

Argon(Ar)

Electronic Configuration:-

• (2,8,8)

More to know:-

Electronic Configuration of First 20elements.

$\boxed {\begin{array}{c|c|c|c|cccc}{}\boxed{\bf{ Element}} & \boxed{\bf{Symbol}} & \boxed{\bf{ Valency}} & \boxed{\bf{Atomic\:Number}}& & \bf{Electron} & \bf Configuration & \\ &&&&\bf K&\bf L &\bf M&\bf N \\ \rm Hydrogen &\sf H & 1 & 1 & 1 &&& \\ \rm Helium &\sf He & 0 & 2 & 2 &&& \\ \rm Lithium &\sf Li & 1& 3 &2 &1 && \\ \rm Beryllium &\sf Be & 2 & 4 & 2 & 2 && \\ \rm Boron &\sf B & 3 & 5 & 2 & 3 && \\ \rm Carbon & \sf C & 4 & 6 & 2 & 4 && \\ \rm Nitrogen &\sf N & 3 & 7 & 2 & 5 && \\ \rm Oxygen &\sf O & 2 & 8 & 2 & 6 && \\ \rm Fluorine &\sf F & 1 & 9 & 2 & 7 && \\ \rm Neon & \sf Ne & 0 & 10 & 2 & 8 && \\ \rm Sodium &\sf Na & 1 & 11 & 2 & 8 & 1 &\\ \rm Magnesium &\sf Mg & 2 & 12 & 2 & 8 & 2 & \\ \rm Aluminium &\sf Al & 3 & 13 & 2 & 8 & 3 & \\ \rm Silicon &\sf Si & 4 & 14 & 2 & 8 & 4 & \\ \rm Phosphorus &\sf P & 3 & 15 & 2 & 8 & 7 & \\ \rm Sulphur &\sf S & 2 & 16 & 2 & 8 & 8 & \\ \rm Chlorine &\sf Cl & 1 & 17 & 2 & 8 & 8 &1 \\ \rm Argon &\sf Ar & 0 & 18 & 2 & 8 & 8 & 2 \\ \rm Potassium &\sf K & 1 & 19 & 2 & 8 & 8 &3 \\ \rm Calcium &\sf Ca & 2 & 20 & 2 & 8 & 8 & 4 \\ \end {array}}$