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atoms and molecules - Coggle Diagram
atoms and molecules
atoms
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subatomic particles
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relative mass
proton and neutron= same relative mass,
electron = negligible mass
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relative charge
atoms consists of an equal number of electrons and protons. a proton carries positive charge (+1), while electron carries a negative charge (-1). the positive and negative charges cancel each other out, thus the atom becomes electrically neutral
formats
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chemical formula
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how to read
- differentiate the different elements first
- read the lower right number to see number of element atoms
example
2 Cl atoms, total = 2 atoms
2 K atoms, 1 C atom, 3 O atoms, total = 6 atoms
2 H atoms. 1 O atoms, total = 3 atoms
3(H2O), 6 H atoms, 3 O atoms, total = 9 atoms
2 Fe atoms, 3 Sulfur atoms, 12 O atoms, total = 17 atoms
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