Arrange the elements in order of increasing electronegativity. use the periodic table to you arrange the elements

Explanation:

It is known that when we move down a group then there will be increase in size and decrease in electronegativity. Whereas when we move across a period then there is decrease in size and increase in electronegativity of an atom.

Therefore, out of the given options oxygen will be most electronegative in nature whereas potassium will be the least electronegative in nature.

Thus, we can conclude that electronegativity in increasing order will be as follows.

                                 K < Mg < P < O

you need to have a picture of the atom that way we can answer it

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied