stability atom

Thermal stability of the hydrides of group 15 elements decreases as we go down the group. Therefore, NH 3 is most stable and BiH 3 is least stable. The stability of the hydrides of group 15 elements decreases in the order: NH 3 > PH 3 > AsH 3 > SbH 3 > BiH 3 Expl..

R 2 C=CR 2 > R 2 C=CHR > R 2 C=CH 2 > RCH=CH 2 According to Saytzeff's rule, any alkyl halide which gives a more stable (i.e. more highly substituted) alkene must undergo dehydrohalogenation reaction faster than the one which gives a less stable (i.e. less highly substituted) alkene. The..

The order of stability of alkyl free radicals is: CH 3 < 1 o < 2 o < 3 o This order of stability can easily be explained on the basis of hyperconjugation. Larger the number of alkyl groups, attached to the carbon atom carrying the odd electron, greater is th..

Relative Stability of Carbocation - We know that methyl group is electron releasing i.e. has +I inductive effect. The alkyl group attached to positively charged carbon atom tends to release electrons towards carbon. This decreases the positive charge on the carbon atom..

Stability of conjugated dienes can be explained in terms of orbital structure 1,3-butadiene. All the four carbon atoms in 1, 3-butadiene are sp 2 hybridized. Each carbon atom also has an unhybridized p orbital, form bond. The hybrid orbitals of each carbon atom..

We know that methyl group is electron releasing i.e. has +I inductive effect. The alkyl group attached to positively charged carbon atom tends to release electrons towards carbon. This decreases the positive charge on the carbon atom but the carbon itself is somewhat positive. A..

Langmuir ,in 1915, obtained atomic hydrogen by dissociating on a hot filament of tungsten or platinum. The dissociation of molecular hydrogen is an endothermic process. The atomic hydrogen is stable only for a fraction of a second and immediately reverts back to its molecular..

Nuclear Stability and Neutron/Proton Ratio - It has been found that the stability of nucleus depends upon its neutron to proton (n/p) ratio. A plot of N (the neutron number) against Z (atomic number or number of protons) show that for stable nuclides upto Z = 20, N = 2..

The stability of a nucleus is dependent on the type of force which is dominant. The two forces operating inside a nucleus are the electrostatic force of repulsion and the nuclear force of attraction (strong force..

Bohr's Model of an Atom - Rutherford's model had a major drawback. It could not explain why ultimately electrons did not fall into the nucleus by taking a spiral path. This was in concurrence with the electromagnetic theory that states 'if a charged particle undergoes accelerated motion t..