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Drupady [299]
3 years ago
11

1. The back legs of frog are very strong and it has webbed feet because ……..​

Chemistry
1 answer:
Shkiper50 [21]3 years ago
5 0

Answer:

It helps them to swim

I think this ans may help you

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Can some atoms exceed the limits of the octet rule in bonding? If so, give an example.
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Answer:

Yes. Example: <u>Sulfur hexafluoride (SF₆) molecule</u>

Explanation:

According to the octet rule, elements tend to form chemical bonds in order to have <u>8 electrons in their valence shell</u> and gain the stable s²p⁶ electronic configuration.

However, this rule is generally followed by main group elements only.

Exception: <u>SF₆ molecule</u>

In this molecule, six fluorine atoms are attached to the central sulfur atom by single covalent bonds.

<u>Each fluorine atom has 8 electrons in their valence shells</u>. Thus, it <u>follows the octet rule.</u>

Whereas, there are <u>12 electrons around the central sulfur atom</u> in the SF₆ molecule. Therefore, <u>sulfur does not follow the octet rule.</u>

<u>Therefore, the SF₆ molecule is known as a </u><u>hypervalent molecule</u><u> or expanded-valence molecule.</u>

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If polar covalent bonding results in a molecule with a positively-charged end and a negatively-charged end, the molecule is call
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If polar covalent bonding results in a molecule with a positively-charged end and a negatively-charged end, the molecule is called D. a dipole. 
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