Atoms, Compounds and Isotopes
Table needed
- Created by: chelsey866
- Created on: 11-03-14 16:25
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- Atoms, Compound and Isotopes
- Atomic number and mass number describe an atom
- THE MASS NUMBER- at the top of the letter
- Total number of protons and neutrons
- THE ATOMIC NUMBER- at the bottom of the letter
- The number of protons
- 1) Different elements will have different numbers of protons
- 2) To get the number of neutrons, just take away the atomic number from the mass number
- 3) Electrons aren't counted in the mass number because their relative mass is very small
- Table needed
- THE MASS NUMBER- at the top of the letter
- Compounds are chemically combined
- 1) Compounds are made when atoms of two or more elements are chemically combined together
- E.G carbon is a compound, its made from a chemical reaction between carbon and oxygen
- Isotopes are the same except for the number of neutrons
- ISOTOPES ARE: atoms of the same element, which have the same number of protons but a different number of neutrons
- 1) If they had different numbers of protons, they'd be different elements
- 2) Carbon-12 and Carbon-14 are two isotopes of carbon
- Carbon-12 6 protons, 6 electrons, 6 neutrons
- Carbon-12: 6 Protons, 6 electrons, 8 Neutrons
- Atomic number and mass number describe an atom
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