CHEM 1001 Chapter : Ch 3 And 4
Document Summary
We m=now base it on c-12 =12 amu exactly. To be neutral something must have no charge or equal amounts of opposite charges. The mass of the electron is 1/1836th the mass of a hydrogen atom, which is 9. 1x 10^-29g. The charge on the electron is the fundamental unit of charge that we call -1 charge unit. Prove something is empty by putting something through it. Use very small particles as bullet with very high energy (alpha [a] particles). Some bullets made contact but most of the atom is empty space which is why particles went through. Over 98% of the a particle went straight through and 2% were deflected by large angles, and. If atom was like a plum pudding, all the a particles should go straight through. Very few of the (a) particles do not go through. Some (a) particles go through but are deflected. )the atom contains a tiny dense center called the nucleus.
