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C1 1.2 Atomic Structure
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- 1C1 1.2Atomic Structure
- 2NucleusContains two types of particles, which are called protons and neutrons. Third type orbits the nucleus. Call these electrons.
Any atom has the same number of electrons orbiting its nucleus as it has protons in its nucleus.
Protons have a positive charge. Neutrons have no charge- they are neutral. Nucleus itself has a positive charge.
Electrons orbiting the nucleus are negatively charged. Relative charge on a proton is +1 and relative charge of electron is -1. - 3Atomic number and periodic tableAll atoms of a particular element have the same number of protons. Eg. Hydrogen has 1 proton in its nucleus, carbon has 6 protons in its nucleus and sodium has 11 protons in its nucleus.
We call the number of protons in each atom of an element its atomic number. - 4Mass numberNumber of protons plus neutrons in the nucleus of an atom is called its mass number.
Eg. If an atom has 5 protons and 4 neutrons the mass number will be 5+4= 9.
Number of neutrons= mass number- atomic number
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- GCSE Science (Chemistry) FlashCards sobre C1 1.2 Atomic Structure , criado por Henry Lane em 12-04-2017.
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