2.5 - Lewis Diagrams(AP)

How many valence electrons does carbon have?

• 2

• 4

• 6

• 8

What must be drawn first to determine the molecular shape of a molecule?

• Atomic mass

• Lewis structures

• Chemical formula

• Molecular weight

When three or more atoms combine to form covalent bonds, which atom typically goes in the middle?

• The most electronegative atom

• The least electronegative atom

• The heaviest atom

• The smallest atom

Why is oxygen more electronegative than nitrogen?

• It has fewer protons

• It is further down the periodic table

• It is more across the table with the same number of shells

• It has fewer electrons

What rule do all atoms in the NO₃⁻ ion fulfill?

• Duet rule

• Octet rule

• Triple rule

• Sextet rule

Which element is less electronegative and goes in the middle when drawing the Lewis structure for C2H3Cl?

• Hydrogen

• Chlorine

• Carbon

• Oxygen

In the Lewis structure of C2H3Cl, which type of bond is formed between the carbon atoms?

• Single bond

• Double bond

• Triple bond

• No bond

Which element cannot go in the middle of a Lewis structure because it wants to form a duet instead of an octet?

• Carbon

• Hydrogen

• Chlorine

• Oxygen

Which elements are exceptions to the octet rule in rows 1 to 2?

• Hydrogen and Helium

• Lithium and Beryllium

• Boron and Carbon

• Nitrogen and Oxygen

What is the main problem when the octet rule is not possible for every atom?

• Atoms become unstable

• Molecules cannot form

• Electrons are lost

• Bonds are too strong