Electronic Configuration

Things to remember

• The systematic distribution of an electron in different shells of an atom is called electronic configuration.
• The outermost orbit or shell of an atom is called valence shell and the number of electrons present in the valence shell of an atom is called valence electrons.
• Valency is defined as the combining capacity of element or radicle with the other element or radical to form a molecule or a compound.
• We use Greek prefixes to describes different valancies like mono for one, di for two, tri for three, tetra for four, penta for five and hexa for six. 
• The energy level or shell nearer to the nucleus s called lower energy level and energy level way from the nucleus is called higher energy level.