finding the general term

General Characteristics of Group - 1. Valence shell electrons On moving down the group the valence shell electrons remain the same. 2. Valency The valency of all the members of a particular group is same. 3. Properties of elements The members of a certain group possess similar properties ..

Molecular hydrides are soft. They are generally, volatile in nature and have low melting and boiling points. They have low electrical conductivity. The electronegativity difference between hydrogen and the atom bonded to it, determines the properties of covalent hydrides. When ..

Apart from hearing impairment, the first effects are anxiety and stress reaction and in extreme cases fright . The physiological manifestations are : Increase in the rate of heart-beat, increased cholesterol and blood pressure. Constriction of blood vessels Digestive spasms and stomach ..

Valence shell electrons : The valence shell electrons increase form one to seven as we move from left to right in a perio..

1. Valence shell electrons The valence shell electrons increase form one to seven as we move from left to right in a period. 2. Valency The valency of the elements with respect to hydrogen, increases form 1 to 4 and then falls from 4 to 1 across the period. The valency with respect to oxygen increa..

When metals like sodium, potassium and calcium are treated with cold water, they react violently with the formation of hydroxides and hydrogen gas. When metals like Mg, Al, Zn and Fe are heated to dull red heat and steam is passed over them , they form their oxides and hydrogen ..

State of existence The covalent compounds do not exist as ions but exist as molecules. There are weak intermolecular forces between the molecules and hence they exist as liquids or gases at room temperature. However, a few compounds also exist in the solid state e.g. urea, sugar et..

From the physical equilibrium studied above, we have noticed that at equilibrium, some of the measurable properties of the system become constan..

Alkenes are more reactive than alkanes due to the presence of a double bond. The carbon-carbon double bond consists of a strong bond and a weak p bond. The typical reactions of alkenes involve the breaking of this weaker p bond, viz., and formation of two sigma ( s ) bonds...

Carbon-carbon triple bond, C=C, is a combination of one and two bonds. Alkynes give electrophilic addition reactions as they show reactivity due to the presence of bonds. This property is similar to alkenes but alkynes are less reactive than alkenes towards electrophilic addition reactions du..