Chapter 2 summary
- Created by: revisionmadi
- Created on: 09-10-19 17:10
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- Atoms, ions and compounds
- Sub-atomic particles
- Proton +1 charge, mass of 1
- Electron -1 charge, mass of 1/1836
- Neutron 0 charge, mass of 1
- Isotopes: atoms of the same element with the same number of protons but different numbers of neutron
- Relative atomic mass=(isotopic masses x % abundances)/100
- Ions to know
- OH-
- NO3-
- CO2|3-
- SO4|2-
- PO4|3-
- NH4+
- m = mass
- z = charge
- Atomic number = proton number
- Relative atomic mass = number of protons and neutrons
- Periods = across
- Atomic radius decreases across a period
- Groups = down
- Tells you the number of electrons in outermost energy level
- can also tell you the ionic charge
- Sub-atomic particles
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