Chemistry
Answer
(a) Duplet Rule — For an atom to achieve stable electronic configuration it must have 2 electrons in the first shell [outermost] like that of noble gas Helium.
(b) Octet Rule — For an atom to achieve stable electronic configuration it must have 8 electrons in outermost orbit like that of noble gases other than Helium.
Related Questions
Explain in brief how atoms of other elements other than noble gases, attain stable electronic configuration of the nearest noble gas.
Atomic number of calcium is 20 and of oxygen is 8. State the number of electrons - calcium loses and oxygen gains to attain stable electronic configuration of the nearest noble gas - during formation of electrovalent molecule, calcium oxide.
Define each of the following terms -
(a) electrovalent bond
(b) electrovalent compound
(c) covalent bond
(d) covalent compound
with suitable examples wherever required.
Sodium chloride is formed as a result of - transfer of electrons from metallic sodium atom to non-metallic chlorine atom. With the help of atomic orbit structure diagram - show the formation of sodium chloride [Atomic numbers: Na = 11, Cl = 17].