03
A force of 20 N acts upon a 5 kg block. Calculate the acceleration of the object.​

The equation we use is F=ma
(Force = mass x acceleration)

We are going to put each number in the equation:
F=ma
20N = 5kg x (?)

So, to find a (acceleration), we do F/m
[acceleration = force/mass]

a = 20/5 = 4

The answer is 4m/s^2

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Neither model is able to show the reactivity of potassium.