explain 3 commonly chronic diseases and 3 commonly infectious disesases
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chronic disease : elephantiasis(enlargement of legs) , Damage of kidney , cancer
Infectiious disease : microbes or micro organisms , fungi , protozoab
Infectiious disease : microbes or micro organisms , fungi , protozoab
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Answer:
ovalent Bonds
Difficulty of Carbon to Form a Stable Ion
To achieve the electronic configuration of the nearest noble gas, He, if the carbon atom loses four of its valence electrons, a huge amount of energy is involved. C4+ ion hence formed will be highly unstable due to the presence of six protons and two electrons.
If the carbon atom gains four electrons to achieve the nearest electronic configuration of the noble gas, Ne, C4− ion will be formed. But again, a huge amount of energy is required. Moreover, in C4+ ion it is difficult for 6 protons to hold 10 electrons. Hence, to satisfy its tetravalency, carbon shares all four of its valence electrons and forms covalent bonds.
Explanation:
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