It’s wave motion. Because when wave passes throug an object, some of the other material can go though on other object(s).
Mass =70 ( Mass of protons=1 ,Mass of neutrons =1, Mass of electron =0.0005(can be ignored))
Therefore, 40 +30=70
Charge= -2 ( it is taking in/attracting electrons to its shell) base on the proton number you are able to identify if it is attracting or releasing an electron, if the electron number is more than proton number then it is attracting therefore resulting in a negative charge vice versa for releasing an electron.
Answer:
Mobiles are made from many non-renewable materials which have been extracted from the earth – such as: Metals. Plastics.
Explanation:
