Chemical bonding practice paper - 2

Chemical bonding practice paper - 2

Name/Give a term/State the following.

1.         An element which has 1,2 or 3 valence electrons and lose electrons to form cations.

2.         An element which has 4,5,6 or 7 electrons in its valence shell and accept electrons to attain stable electronic configuration.

3.         A covalent compound which when dissolved in water behaves like an electrovalent compound.

4.         A polar covalent compound with one lone pair of electrons on Nitrogen atom.

5.         A non polar covalent molecule of identical atoms with one triple bond.

6.         A polar covalent compound which combines with H⁺ and forms Hydronium ion.

7.         The charged particle which attract one another in the formation of an electrovalent compound.

8.         A bond formed by the transfer of electrons from an electropositive element to an electronegative element.

9.         A bond formed by a shared pair of electrons with both electrons coming from the same atom.

10.     Metals lose electrons during ionization to form cations.

Give reasons

1.      Electrovalent compounds are crystalline solids and have high boiling point and melting point.

2.      Electrovalent compounds are non volatile.

3.      Electrovalent compounds conduct electricity in fused or aqueous solution state but do not in solid state.