It is very difficult for an atom to accept a proton. It can only be done under very special circumstances. So A and C are both incorrect. I don't see how D is possible. The atom does lose 1 electron, but how it gets 21 is think air.
The answer is B which is exactly what happens.
Between 2 weeks and a month
Answer:
Horizontal distance is 1.28 + 2.04 = 3.32 m
Explanation:
Given data:
from below figure
Applying Pythagoras theorem
from Snell's law


solving for x we have

x = 1.28
Horizontal distance is 1.28 + 2.04 = 3.32 m
Answer:
yes, kinda like when babies are made, there is friction
Explanation:
The increasing in size of an object on heating is called expansion where the decrease in size of an object on cooling is calles contraction.