IBDP Chemistry Question Analysis Topic: Chemistry - Short Questions
Exam Questions:
1) How are interhalogen compounds formed? What general compositions can be assigned to them?
2) What is the covalency of nitrogen in N2O5?
Answers:
For IBDP Chemistry, you should know:
1) Interhalogen compounds are molecules that consist of two or more different halogen atoms e.g., fluorine, chlorine, etc. as well as no atoms of elements from the other groups.
Most of such compounds are seen as binary. Their formulae are generally XYn, where n is either 1, 3, 5 or 7, and X is the less electronegative between the two halogens.
Here are some examples of interhalogen compounds:
- Diatomic
- Tetratomic
- Hexatomic
- Octaomic interhalogens.
2) In this case, the covalency of N would be 4.
To put it in other words, covalency is valence that is characterized by how electrons are shared in a compound.
As an example - dinitrogen pentoxide; the covalency of nitrogen would be 4 since 3 of which are covalent bonds, and the remaining one being a coordinate covalent bond.
Work hard for your IBDP Chemistry examination!
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