8. Which of the following group of three metals is arranged in order of increasing chemical property?
a. Potassium, iron, lead
b. gold, tin, sodium
C. zinc, calcium, silver
d. lithium, silver, gold
9. It is the ability of metal to carry electric current.
a. thermal conductivity b. ductility
c. malleability
d. electrical conductivity
10. What best explains why metals are good electrical conductors?
a. Their atoms are loosely packed and able to move freely.
b. Metal atoms form a long time that allows little movement.
c. Metal ions form a lattice surrounded by a "sea of free electrons".
d. Their atoms are held together by strong electrostatic attraction between anions
and cations.​

give me abc and i will get it for u.

gas

explanation:

smoke is the matter of a gas

(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