Atomic Structure
- Created by: shaunie
- Created on: 26-04-13 10:43
View mindmap
- Atomic Structure
- The Atom
- Nucleus = Protons + Neutrons
- nucleus accounts for most of the mass of the atom
- Outer Shell = Electrons
- Negative charge
- Orbit the nucleus
- Electron orbitals account for most of the volume of the atom
- Nucleus = Protons + Neutrons
- Nuclear symbols
- for neutral atoms which have no overall charge the number of electrons is the same as the number of the protons
- mass number tells you the total number of protons and neutrons in the nucleus
- the number of neutrons is the mass number- proton number
- mass number is the number at the top of the chemical symbol
- the number at the bottom of the chemical symbol is the proton number
- the proton number is the same for every atom of the element
- the proton number can be used to identify the element
- Ions
- Negative Ions
- more electrons then protons
- Positive ions
- fewer electrons then protons
- Negative Ions
- isotopes
- atoms with the smanumber of protons but different number of neutrons
- The atomic number is the same for each atom
- different mass numbers = different number of neutrons
- properties
- physical
- physical properties differ slightly such as density or rate of diffusion as they tend to depend on the mass of the atom
- chemical
- chemical properties depend on the electron configuration and since electrons are neither added or taken in an isotope the chemical properties remain the same
- physical
- The Atom
Comments
No comments have yet been made