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Basic Science : Chemistry
Practice Questions
Write a short note on electronic theory
me of inert gases do not form molecules ?
2. Why atoms of inert gases do
Define chemical bond. How is it formed 2
4 Write a short note on ionic bonding.
s Explain the formation of MgO molecule.
6. What is a covalent bond ? How is it formed 2 w
2 How is it formed ? Write properties.
Answers
Answer:
Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities,[1] and is the primary interaction occurring in ionic compounds. It is one of the main types of bonding along with covalent bonding and metallic bonding. Ions are atoms (or groups of atoms) with an electrostatic charge. Atoms that gain electrons make negatively charged ions (called anions). Atoms that lose electrons make positively charged ions (called cations). This transfer of electrons is known as electrovalence in contrast to covalence. In the simplest case, the cation is a metal atom and the anion is a nonmetal atom, but these ions can be of a more complex nature, e.g. molecular ions like NH+
4 or SO2−
4. In simpler words, an ionic bond results from the transfer of electrons from a metal to a non-metal in order to obtain a full valence shell for both atoms.