Answer:
12 valence electrons
Explanation:
Number of valence electrons: 2 carbons (2 x 4 valence electrons= 8e-) and 4 hydrogens (4 x 1 valence electron = 4 e-) added up gives us 12 valence electrons to work with: Counting the bonds we have made shows that we have used up 10 of the 12 valence electrons leaving us with 2 to complete the octets.
The answer is D. The sum of the mass of all the pieces of paper is 2 grams. Hope this helped! Good luck! :)
Protons-33
neutrons-42
electrons-33
Answer:
2 double bonds 2 single bonds