Polarity of Covalent Bonds (1 Viewer)

[AirbusA380]

Hey guys,
First timer here. I have two questions that im having trouble with for a prac because my chem teacher gives us pracs before explaining the content that the questions are asking about, eg. polarity and intermolecular forces.
Question 2:Name the polar molecules from Table 20.4 and explain why they are polar (Ive answered this) - what is the model even called?
Question 3: Give two limitations of the bonding model used for the compounds in question 2.
And
Question 4: Name an element/s that can form stable single, double and triple bonds with its own atoms.
Ans. Carbon.
Question 5: Name at last two limitations of modelling the above compounds - Again what is the model and the limitations.
Thanks guys.

 

[strawberrye]

Can you tell us what molecules are in the table you have specified?

 

[AirbusA380]

Methane, ammonia, water, hydrogen chloride, butane, phosphine, oxygen, carbon dioxide, ethene, nitrogen and ethyne. Thanks.

 

[someth1ng]

Methane, ammonia, water, hydrogen chloride, butane, phosphine, oxygen, carbon dioxide, ethene, nitrogen and ethyne. Thanks.

All of the bolded are polar.

 

[someth1ng]

Hey guys,
First timer here. I have two questions that im having trouble with for a prac because my chem teacher gives us pracs before explaining the content that the questions are asking about, eg. polarity and intermolecular forces.
Question 2:Name the polar molecules from Table 20.4 and explain why they are polar (Ive answered this) - what is the model even called?
Question 3: Give two limitations of the bonding model used for the compounds in question 2.
And
Question 4: Name an element/s that can form stable single, double and triple bonds with its own atoms.
Ans. Carbon.
Question 5: Name at last two limitations of modelling the above compounds - Again what is the model and the limitations.
Thanks guys.

Not sure what Q3 is referring to.

Q4 is nitrogen and carbon.

Not sure what Q5 is referring to.

These are possibly the most poorly written questions I have ever seen, to say the least.

 

[hawkrider]

Not sure what Q3 is referring to.

Q4 is nitrogen and carbon.

Not sure what Q5 is referring to.

These are possibly the most poorly written questions I have ever seen, to say the least.

Is that normally the case for Chemistry?

 

[AirbusA380]

Is that normally the case for Chemistry?

Tell me about it. Im hating chem because of my teacher and how he teaches - doesn't even teach the content before giving us the work.
Thanks anyway guys.

 

[someth1ng]

Is that normally the case for Chemistry?

No, most questions make sense - it's only these, in particular, that are poorly written.

 

[ivorybranches]

For model limitations I'm pretty sure it's okay to simply be very nit picky and just point out anything, e.g. not a 3D model, suggests electrons only move in one direction, doesn't show charges, for polarity - does not show lone pairs.