Consider the compound crotonaldehyde, whose skeleton is
-How many electrons must be shown in the Lewis structure of this molecule?
A) 32
B) 28
C) 18
D) 24
E) 12

Question

Consider the compound crotonaldehyde, whose skeleton is 
-How many electrons must be shown in the Lewis structure of this molecule?
A) 32 
B) 28 
C) 18 
D) 24 
E) 12

Quizplus · Accepted Answer

To determine the number of electrons needed to draw the Lewis structure of crotonaldehyde, we first need to determine the number of valence electrons for each atom in the molecule:

C = 4 valence electrons
O = 6 valence electrons
H = 1 valence electron

There are 4 carbon atoms and 4 hydrogen atoms in crotonaldehyde, as well as 2 oxygen atoms in the form of a carbonyl group. Therefore, the total number of valence electrons in the molecule is:

4(4) + 2(6) + 4(1) = 24

The Lewis structure of crotonaldehyde will show all 24 valence electrons, so the correct answer is (B) 28, which includes the additional four bonding electrons between the carbon atoms.

Consider the Compound Crotonaldehyde, Whose Skeleton Is