During reaction between calcium and oxygen valence electrons

A. are transferred from atoms of calcium to atoms of oxygen to form Ca+ and O- ions

B. are shared between atoms of calcium and atoms of oxygen

C are transferred from atoms of calcium to atoms of oxygen to form Ca+2 and O-2 ions

D. are transferred from atoms of oxygen to atoms of calcium to form Ca- and O+ ions

i believe it is 40–40–20%

explanation:

well in order to answer this question you have to provide more information < 3

there are two significant figures.

(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