Atoms, Compounds and Isotopes
- Created by: Maddie A-P
- Created on: 18-03-15 08:30
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- Atoms, Compounds and Istopes
- The mass number is the total number of protons and neutrons.
- The atomic number is the total number of protons.
- Atoms of the same element will have the same number of protons.
- To get the number of neutrons, just subtract the atomic number from the mass number.
- Electrons aren't counted in the mass number because their relative mass is very small.
- Compounds are formed when atoms of two or more elements are chemically combined together.
- It's difficult to separate the two original compounds out again after they have been mixed.
- Isotopes are different atomic forms of the same element, which have the same number of protons but a different number of neutrons.
- Isotopes must have the same atomic number but different. If they had different atomic numbers, they'd be different elements.
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