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Chemical Bonding and Molecular Structure
Differentiate between a covalent bond and co-ordinate bond.
| Covalent Bond | Co-ordinate Bond |
| 1. This is formed by sharing of two electrons. Each atom supplies electron. A. +. B → A:B. |
1. One atom contributes an electron pair while the sharing is done by both atoms. X : + Y → X : Y |
| 2. Denoted by A - B | 2. Denoted by Xδ+ → Yδ– |
| 3. Formed between electron deficient atoms. | 3. Formed between a donor with a lone pair and an acceptor (electron pair deficient). |
| 4. Formed between atoms. | 4. Formed between molecules or between molecules and ions. |
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Name the conditions for the formation of an ionic bond between two atoms.
What is crystal lattice?
What is electrovalency?
What bond is present in MgCl2 molecules?
Two elements A and B have the electronic configuration as:
A = 1s22s22p63s2 and B = 1s22s22p5
Write the empirical formula of the substance containing A and B.
What type of bonding would you expect between:
(i) a metal and a non-metal
(ii) a non-metal and another non-metal?
Give reasons in one or two sentences for the observation that in their compounds non-metals form anions and not cations.
Out of Na and K, which will form a more stable ionic bond?
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