What is electron affinity ? The  amount of energy  released when an electron is added to the valence shell of an isolated gaseous ato...

How does ionization potential depends on atomic size ? Th e larger the atomic size, the smaller is the ionization potential .This is d...

What is penetration effect ? The probability of electrons coming closer to the nucleus in their motion around the nucleus is called pene...

What is ionization energy ? The ionization energy of an element is defined as the amount of energy required  to remove an outer most va...

Why quinuclidine is a stronger base than N,N dimethyl aniline ? In N,N dimethyl aniline the electron pair on N-atom can undergo reson...

What is hydrogen bonding ? When a proton donor group interacts with an electron donor having a lone pair of electrons or a pi bond, a ...

What is elements of symmetry ? Organic molecules are covalent compounds having definite bond length and bond angles among the constituen...

What is shielding effect ? In multi-electron atoms, there are a number of electrons .Some of them,occupying lower energy orbitals, te...

What is periodicity ? In periodic table, it has been found that elements withsimilar properties fall in the same group. The repetitio...

Ring-chain isomerism and metamerism. What is ring-chain isomerism ?  Two structural isomers having the same molecular formula but ...