Which compound contains covalent bonds?
a - beo
b- nacl
c- cas
d- mgf2
e - so2

SO2

Explanation:

SO2 is covalent since it is formed by the sharing of electrons between sulphur and oxygen also both the sulphur and oxegen atoms are non metal.

and we know that non-metal non-metal always bond together via covelent bonding

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

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