Atomic structure
- Created by: RachelH
- Created on: 16-03-14 15:07
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- Atomic structure
- The nucleus at the centre of an atom contains two types of particle, called protons and neutrons
- Protons have a positive charge and neutrons have no charge
- Electrons are tiny negatively charged particles that move around the nucleus
- An atom has no overall charge because the number of protons is equal to the number of electrons and their chargers are equal and opposite
- Proton +1 and electron -1
- An atom has no overall charge because the number of protons is equal to the number of electrons and their chargers are equal and opposite
- All atoms of an elements contain the same number of protons
- This number is called the atomic number (or proton number) of the element
- Elements are arranged in order of their atomic numbers in the periodic table
- The atomic number is also the number of electrons in an atom of the element
- The mass number is the total number of particles in the nucleus of an atom, so it is the number of protons plus the number of neutrons
- The nucleus at the centre of an atom contains two types of particle, called protons and neutrons
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