formulae and equations
- Created by: Rosyposyxx
- Created on: 02-07-17 13:28
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- Formulae and equations
- Atoms of metals on the left of the periodic table lose electrons to form cations
- Copper (II)- Cu2+
- Iron (III)- Fe3+
- Atoms of non-metals on the right of the periodic table gain electrons to form anions
- Chlorine- Cl-
- Binary compound
- Contains two elements only
- In ionic compounds is named- metal nonmetalide
- Polyatomic ions
- Ammonium- NH4+
- Hydroxide- OH-
- Nitrate- NO3-
- Nitrite- NO2-
- Hydrogencarbonate- HCO3-
- Manganate (VII)- MnO4-
- Carbonate- CO3 2-
- Sulphate- SO4 2-
- Sulphite- SO3 2-
- Dichromate- Cr2O7 2-
- Phosphate- PO4 3-
- Brackets are used if there is more than one polyatomic ion
- Formulae of ionic compounds
- Overall charge is 0
- Sum of positive charges= sum of negative charges
- Covalent compounds do not contain ions, they consist of small molecules bonded together
- Diatomic molecules
- H2
- O2
- F2
- N2
- Cl2
- Br2
- I2
- P4
- S8
- Exist as small molecules
- Diatomic molecules
- Diatomic molecules
- H2
- O2
- F2
- N2
- Cl2
- Br2
- I2
- P4
- S8
- Exist as small molecules
- State symbols
- g (gas)
- l (liquid)
- s (solid)
- aq (aqueous)
- Balancing Equations
- Do not change chemical formulae
- Balancing numbers go in front
- make the same number of atoms of each element on each side of the equation
- Balancing brackets means everything is multiplied
- Atoms of metals on the left of the periodic table lose electrons to form cations
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