- Created by: shayoni
- Created on: 04-12-12 21:51
1.1.2 Atomic Structures
Protons neutrons and electrons
over 100 years ago chemists put forward a model a model of a nuclear atom, each atom is made up of protons, neutrons and electrons.
*Protons and neutrons make up the center of the atom, the nucleus.
*Electrons orbit the nucleus, in shells.
*The nucleus is tiny compared to the total volume of an atom.
*Nucleus of an atom is the most dense and makes up most of the atoms mass.
*Most of an atom consists of empty space, Between the nucleus and the electron shells.
Although the nucleus contains almost all of the atoms mass it makes up only a tiny portion of the atoms volume. In proportion... if the nucleus was a grape then the outer electrons would be about 1.5km away.
Relative mass of a proton is 1 Relative charge is 1+
Relative mass of a neutron is 1 relative charge 0
relative mass of an electron…