The atomic number of Sodium(Na) =11.
The correct electronic configuration of sodium is 2,8,1.
So, The correct option is (d) 2,8,1.
A driver of a car travelling at \(52\) \(km \;h^{–1}\) applies the brakes Shade the area on the graph that represents the distance travelled by the car during the period.
Which part of the graph represents uniform motion of the car?