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In XA5, the central atom has (both X and A are halogens)
- a)5 bond pairs and no lone pairs
- b)5 bond pairs and one lone pair
- c)6 bond pairs and no lone pairs
- d)4 bond pairs and one lone pair
Correct answer is option 'B'. Can you explain this answer?
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In XA5, thecentral atom has (both X and A are halogens)a)5 bond pairs ...
It has square pyramidal shape and it has 5 bond pairs and one lone pair.
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In XA5, thecentral atom has (both X and A are halogens)a)5 bond pairs ...
In XA5, the central atom has 5 bond pairs and one lone pair. This can be explained by looking at the electronic configuration and bonding pattern of the halogens.
1. Electronic configuration:
Halogens belong to Group 17 of the periodic table, also known as the halogens. They have 7 valence electrons in their outermost shell. In order to achieve a stable octet (8 valence electrons), halogens tend to gain one electron by forming a single covalent bond.
2. Bonding pattern:
In XA5, the central atom forms bonds with 5 other halogen atoms (represented by X). Each halogen atom contributes one electron to form a covalent bond with the central atom. As a result, the central atom is surrounded by 5 bond pairs.
3. Lone pair:
In addition to the 5 bond pairs, the central atom also has one lone pair. A lone pair is a pair of valence electrons that are not involved in bonding with other atoms. It is localized on the central atom and occupies a region of space around it.
The presence of the lone pair in XA5 can be explained by the electronic configuration of the central atom. Since the central atom has 7 valence electrons, after forming 5 covalent bonds, it still has 2 valence electrons that are unpaired. These two electrons form a lone pair on the central atom, resulting in a total of 6 electron pairs around the central atom (5 bond pairs and one lone pair).
Therefore, the correct answer is option 'B' - the central atom in XA5 has 5 bond pairs and one lone pair.
1. Electronic configuration:
Halogens belong to Group 17 of the periodic table, also known as the halogens. They have 7 valence electrons in their outermost shell. In order to achieve a stable octet (8 valence electrons), halogens tend to gain one electron by forming a single covalent bond.
2. Bonding pattern:
In XA5, the central atom forms bonds with 5 other halogen atoms (represented by X). Each halogen atom contributes one electron to form a covalent bond with the central atom. As a result, the central atom is surrounded by 5 bond pairs.
3. Lone pair:
In addition to the 5 bond pairs, the central atom also has one lone pair. A lone pair is a pair of valence electrons that are not involved in bonding with other atoms. It is localized on the central atom and occupies a region of space around it.
The presence of the lone pair in XA5 can be explained by the electronic configuration of the central atom. Since the central atom has 7 valence electrons, after forming 5 covalent bonds, it still has 2 valence electrons that are unpaired. These two electrons form a lone pair on the central atom, resulting in a total of 6 electron pairs around the central atom (5 bond pairs and one lone pair).
Therefore, the correct answer is option 'B' - the central atom in XA5 has 5 bond pairs and one lone pair.
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In XA5, thecentral atom has (both X and A are halogens)a)5 bond pairs and no lone pairsb)5 bond pairs and one lone pairc)6 bond pairs and no lone pairsd)4 bond pairs and one lone pairCorrect answer is option 'B'. Can you explain this answer?
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