Formal Charge and Valence Electrons

The video tutorial explains how to calculate the formal charge for each element in C2H2 using Lewis structures. It covers the calculation for hydrogen, which has a formal charge of zero, and for carbon, which also has a formal charge of zero. The tutorial concludes that the Lewis structure with all formal charges at zero is the most stable and favorable for C2H2.

What is the first step in finding the formal charge of an element in a molecule?

• Identify the number of protons

• Use the Lewis structure and a formula

• Count the total number of atoms

• Determine the molecular weight

How many valence electrons does hydrogen have according to the periodic table?

• Two

• Four

• Three

• One

What is the formal charge of hydrogen in C2H2?

• Negative one

• Zero

• One

• Two

In which group is carbon found on the periodic table?

• Group 18

• Group 1

• Group 14

• Group 7

How many valence electrons does carbon have?

• Two

• Six

• Four

• Eight

What is the formal charge of carbon in C2H2?

• Two

• Zero

• One

• Negative one

What does a formal charge of zero indicate about a Lewis structure?

• It is unstable

• It is more stable or favorable

• It has an error

• It is incomplete

What is the overall formal charge of the C2H2 molecule?

• Two

• Zero

• One

• Negative two