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.
Ionic( cation and anion) size difference from neutral parent atom?
Q: Why cation is smaller than its parent atom ? An atom has equal number of positive protons and negative electrons. This atom becomes cation after losing one or more electrons.Due to this imbalance between negative charge electrons and positive charge protons. Protons in Nucleus exerts more force of attraction on electronic shells. As a result cation becomes smaller than its parent atom. for example if we take Na atom it has 11 electrons in shells and 11 protons in nucleus. To become cation, Na loses its one electron from outermost shell. So one electron become less than proton , so more force of attraction exerts on electrons and size of cation becomes small. Q: Why anion is greater than its parent atom? An atom has equal number of positive protons and negative electrons. Atom becomes anion after gaining one or more electrons. Due to this imbalance between negative charge electrons and positive charge protons.Nuclear charge ( charge due to protons) exerts less at...
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