20 elements in hund's rule

It states that when more than one orbital of equal energies are available then the electrons will first occupy these orbitals separately with parallel spins. The pairing of electrons will start only after all the orbitals of a given sub level are singly occupied. This is because electrons with par..

Hund's Rule of Maximum Multiplicity - According to this rule, electron pairing will not take place in orbitals of same energy (same sub-shell) until each orbital is first singly filled with parallel spin. In other words in a set of orbitals having same energy (degenera..

According to this rule, electron pairing will not take place in orbitals of same energy (same sub-shell) until each orbital is first singly filled with parallel spin. In other words in a set of orbitals having same energy (degenerate orbitals), the electrons distribute themselves to..

Second Row Elements - In lithium (Z =3), the third electron goes to the next 2s orbital. In Beryllium (Z = 4), the fourth electron fills 2s orbital and in boron (Z = 5), the next electron goes to the next available 2p orbital. In carbon, the sixth electron is also to go into the 2p orbita..

Electronic Configurations of Atoms - Based upon the rules and sequence of energy levels, one can write the electronic configurations of atoms of some rows of the periodic tabl..

All the elements belonging to I B, II B, III B, IV B, V B, VI B, VII B, VIII B are called transition elements. They resemble each other in several physical and chemical properties. They are all metals. They are called transition elements because they are placed betwee..

The name of the element that occurs first in the compound is written first without any change in its spelling. In naming MgO, the first part of the formula is magnesium. If the metal has a variable valency the Roman numeral is included. For example: FeO would be named as iron (II) oxide...

When four different atoms are attached to the chiral carbon, priority depends on atomic number. The atom with the highest atomic number gets top priority. If the two atoms are isotopes of the same element, the atom of higher mass number has higher priorit..

Compounds containing three elements (ternary compounds), one of which is oxygen are named with suffix ate at the end, provided there is only one such compound. If there are two compounds, the one with more oxygen is named with the suffix ate and the one with less oxygen is named with -it..