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Summary AQA A level chemistry atomic structure full revision notes
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A helpful and comprehensive set of revision notes covering the entire first unit of AQA A level chemistry- atomic structure
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Atomic Structure1.1 FUNDAMCNTAL PARTICLES,1.2 IsoTOPES, 1.3 ELECTRON ARRANGEMENTS
DEVELOP1NG 1DEAS
1661
Robert Boyle - proposed simple substances (elements)
1803 - John Dalton ndiv1s1ble atoms
1346 -
1411 -
" Henry Beqverel radioact vity
Earnest Rutherford - nudear model
1913 Njels Bohe - electrons
1426 - Erwin Shröd1nger - electrons ex1st as waves and partides
1432 - James hadwick neutron
1432 - Gilbert Lewis nert nobel gases (full outer shell): IOns when
atoms lose or gain electrons i atoms also bond by sharing eledrons
Protons and neutrons are held together by a veny
strong neudear force.
Protons and eletrons are held together by
eletrostaBie forees of atation.
Atome number e number of protons
Mass nUmber : numb r of protons and neutrons
neutrons
ISOTOPES - atoms with same number of protons but different numbers of
Radioatue isotope carbon -l4 is used for carbon dating.
ELECTRON SAELS
2n
The maximym number of electrons in each sheM s
Ist she|l : 2, Znd shell :8, 3rd shell : 18
Na
e-g Wa (2, 8,I)
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