halogen atom

Introduction - The halogen derivatives of aliphatic and aromatic hydrocarbons are called haloalkanes and haloarenes. These are obtained when the hydrogen atom of an alkane and arene is replaced by a halogen atom (F, Cl, Br and I..

The elements placed in group VIIA of the periodic table are called halogens. All these elements form salts called halides, e.g. NaCl, NaI, KCl, KI etc. Halogen is an ancient Greek word meaning 'salt producer'. Halogens have seven electrons in their valence shell and s..

Introduction - The halogen derivatives of aliphatic and aromatic hydrocarbons are called haloalkanes and haloarenes. These are obtained when the hydrogen atom of an alkane and arene is replaced by a halogen atom (F, Cl, Br and I). Their general formulae a..

Like halogens, hydrogen is diatomic (H 2 ) whereas metals are monoatomi..

Alkenes with concentrated aqueous solution of halogen acids give haloalkanes. The order of reactivity is,HI > HBr > HCl For example: Ethene gives Ethane haloethane 2-butene with HBr gives 2-Butene ..

Halogens have high electron affinity values and therefore they have strong tendency to take up the electro..

Alkynes reacts with halogen acids according to the Markownikoff's rule i.e. the carbon atom carrying the least number of hydrogen atoms will have the negative part of the addendum attached to it. For example, ethyne (acetylene) with HBr gives, With diluted HCl..

Alcohols can be converted into haloalkanes by treatment with halogen acids (HX). However, the rate of the reaction depends on both the nature of alcohol and the halogen acid. For example: Primary and secondary alcohols form chloroalkanes when hydrochloric acid gas is passed thr..

Atomic Number Name Electronic Configuration 9 Fluorine 2 7 17 Chlorine 2 8 7 35 Bromine 2 8 18 7 53 Iodine 2 8 18 18 7 85 Astatine 2 8 18 32 18 7 Fluorine is the most reactive of the ..

Sometimes hydrogen atoms have special names such as vinylic hydrogen (attached to double bonded C-atom), allylic hydrogen (attached next to double bonded C-atom). The replacement of halogen atom for these types of hydrogen atoms results i..