C1 atomic structure revision
- Created by: bigbeanz123
- Created on: 08-05-20 12:12
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- Atoms
- Atomic structure
- Structure of the atom
- The nucleus at the centre contains two subatomic particles called protons + neutrons
- Electrons are tiny negatively charged particles that move around the nucleus.
- All atoms of the element have the same number of protons. This number is the atomic number.
- The mass number is the total number of particles in the nucleus of an atom.
- Electronic structure
- Electrons are arranged around the nucleus in shells and each shell represents a different energy level.
- The first and lowest energy level can hold up to two electrons. The second level ca hold up to eight electrons.
- The electronic structure shows the number of electrons in each level, you start by recording the lowest energy level.
- Elements in the same group of the periodic table have the same of electrons in their highest energy level.
- Structure of the atom
- There are about 100 different elements and the periodic table lists them all.
- The elements are arranged in columns called groups and the groups usually have similar properties.
- Atoms have a tiny nucleus surrounded by electrons.
- Atomic structure
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