Z/E

[Michelle Kam 1F]

When trying to name molecules either Z and E, we have to compare the atomic numbers of the molecules attached to the sp2 hybridized carbon and pick the one with bigger atomic number . So what if two the we're comparing have the same atomic number? Like CH2CH3 vs. CH3. Which one would you pick then? Both have the atomic number of 6.

[stephanieyang_3F]

You would keep going down the chain until one of them has a bigger atomic number. For CH2CH3 and CH3, CH2CH3 would have the higher priority since C is bigger than H.