The answer is the last one (it needs a medium through which to travel) it is not true about radiation. A radiation is the emission of energy in the form of waves or particles through space or through a material medium. This includes; electromagnetic radiation, such as a radio wave, microwaves, visible light, x rays, and gamma radiation.
2 stands for valency of ca ion
its +2
that it takes two electrons to complete its shell
Answer:
temporary changes are the changes which are there only for a short period if time.
Explanation:
generally temporary changes are reversible. permanent changes are the changes which remain for a longer time and are not reversible
Answer:
it is energy
Explanation:
Energy is the ability to do work
Answer:
the answer to this question is option A mark me as brainliest
mark me as brainliest
