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CARBON - Coggle Diagram
CARBON
Atomic Structure
relative atomic mass : not whole no. as isotopes exist in different proportions and Ar is weighted average
isotopes : C12, atoms of the same no. of protons but diff no. of neutrons
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Acids and Bases
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test for CO2 : bubble gas through limewater, if gas is CO2, a white precipitate is formed
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collection of CO2 :
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Air and Air Pollution
carbon cycle
to regulate amount of carbon dioxide in the atmosphere, the rate of removal of carbon dioxide must be balanced by three productions of gas : respiration and combustion produce carbon dioxide while photosynthesis removes carbon dioxide
pollution from carbon
1) carbon dioxide : if carbon dioxide is added to the atmosphere at a faster rate than it is removed, it will contribute to global warming as CO2 is a greenhouse gas leading to melting of glaciers, sea level rise and more
2) carbon monoxide : poisonous gas that binds with haemoglobin in the rbc of human, preventing it from transporting oxygen around the body, leads to death
Bonding and Structure
giant covalent structure
diamond
-high mp bp : a lot of energy is needed to overcome strong covalent bonds
-hard : numerous covalent bond throughout the whole structure
graphite
-conducts electricity : due to mobile electrons as each carbon atom is bonded to 3 other carbon atoms
-soft and slippery : weak forces between layers of carbon, can slide easily
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