Describe how you would draw the electron dot structure for bromine and then draw the structure.

Electron dot structures are the structures which represent the valence electrons of the element around the chemical symbol of the element.

Bromine is an element which belong to group 17 and is a halogen. Atomic number of bromine is 35 that means it contains 35 electrons, Thus the electronic configuration is represented as:

Thus the valence electrons are 7. Thus 7 electrons are represented around chemical symbol of Bromine i.e. Br.

(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