WHY ALKENES ARE CALLED OLEFINS?
Olefins mean " OIL FORMING". ALKENES are known as olefins because of its first member ethene C2H4 - also called as ethylene. Ethylene gives product of oil texture when reacts with halogens.
Duplet and Octet Rules| Definition, Concept Points, Examples|
All atoms are unstable alone- except monoatomic molecules (noble gases) are stable atoms- atoms want to be stable by making molecules. In process of making molecules atoms follow either duplet or octet rules. Actually all atoms tend to be like its nearest noble gas by copying their electronic configurations. All noble gases have eight electronic configuration i.e noble gases have eight electrons in valence shell except helium( He) which has 2 electrons in valence shell. in order to get electronic of its nearest noble gas atoms either get electrons, lose electrons or share electrons. then they form stable molecules and compounds. OCTET RULE: An atom tends to get electronic configuration of its nearest noble gas- in order to get stable like noble gases- in periodic table by having 8 electrons in its valance shell. EXAMPLES: Sodium ( Na) belongs to IA group in periodic table.its atomic number (Z) is 11. IA group elements have 1 electron in its outer most shell.Group number repr...
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