Drawing Acrylonitrile

[CNourian2H]

Problem 2F.13 asks to draw Acrylonitrile, which is CH2CHCN, and then state the bond angles. How do I know which element is the central atom and how to organize the surrounding molecules? The drawing affects what bond angles I put, so is there a way to ensure I draw it correctly with all compounds similar to this?

[nicolely2F]

This is an organic chain molecule. In other words, it's a chain formed by C. If you're not very familiar with ochem, another way to go around this would be: H is for sure on the periphery and central atoms are going to be the least electronegative, therefore, C-atoms are going to form the central chain