First, you ask your mom if she does not know ask your dad(if You are living with him) if he does not know as your gradparents then if they dont know Your WHOLE fanil is some DUMB Bi..ches
The mass number is the number of the atomic mass. The atomic mass is the mass of the atom of the element. There is no difference between the two, except mass number is referring to the number, while...
Modern thought has it that a body about the size of Mars, and given the name of Theia, collided gently with the Earth, and the debris from the collision resulted in the formation of the Moon. Thus...