Chemistry C1 triple award aqa part 1
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- Chemistry C1 AQA Triple award
- Atoms and Elements
- Atoms have a small nucleus surrounded by electrons
- The Nucleus
- in the middle of an atom
- contains protons and neutrons
- protons are positively charged
- neutrons have no charge (they're neutral)
- nucleus has an overall positively charge
- The Electrons
- move around the nucleus
- they are negatively charged
- tiny but cover alot of space
- they occuy shells around the nucleus
- The Nucleus
- number of protons equall the number of electrons
- atoms have no charge overall (they're neutral)
- number of protons are the same as the number of electrond
- the charge on the neutrons is the same as the electrons but just opposite
- if some electrons are added or removed the atom becomes charged and it becomes an on
- elements only consist of 1 atom
- number of protons determines the atom
- if a substance only contains one type of atom its called an element
- Atoms have a small nucleus surrounded by electrons
- The Periodic Table
- image
- stick periodic table here
- atoms are represented by symbols
- one or two letter symbol
- O = oxygen
- Mg = magnesium
- C = Carbon
- one or two letter symbol
- atom diagram
- atom structure as seen on a periodic table
- top number = mass number
- bottom number = number of protons and electrons
- number of neutrons = proton number - mass number
- (stick atom diagram here)
- atom structure as seen on a periodic table
- the periodic table puts elements with similar properties together
- the elements in the final column are all noble gases
- they all have a full outer shell of electrons
- all of the elements in a group haver the same amount of electrons in the outer shell
- this is why elements in the same group are similar
- the vertical columns are called groups and are represented by roman numerals
- the elements in the final column are all noble gases
- image
- Atoms and Elements
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