Understanding Lewis Structures

What does the chemical symbol in a Lewis structure represent?

• The nucleus and core electrons

• The atomic mass

• The entire atom

• The valence electrons only

How many valence electrons does nitrogen have in its Lewis structure?

• Seven

• Eight

• Five

• Three

What is the maximum number of dots allowed on one side of a chemical symbol in a Lewis structure?

• One

• Two

• Three

• Four

What is unique about helium's electron configuration?

• It shares electrons with hydrogen

• It has an incomplete valence shell

• It has a full valence shell with two electrons

• It has a single electron

What term is used to describe helium's stable electron configuration?

• Duet

• Octet

• Triplet

• Quartet

Which element in period two has a full valence shell in its Lewis structure?

• Oxygen

• Lithium

• Neon

• Carbon

What is the electron configuration of neon in its Lewis structure?

• 1s2 2s2 2p3

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2s2 2p5

What rule describes the stability associated with having eight electrons surrounding an atom?

• Duet rule

• Octet rule

• Triplet rule

• Quartet rule

What happens when the N equals 2 shell is full in a Lewis structure?

• Electrons move to a 3s orbital

• Electrons are shared with another atom

• Electrons are removed

• Electrons stay in the same shell

What is an expanded octet?

• A configuration with less than eight electrons

• A configuration with no electrons

• A configuration with exactly eight electrons

• A configuration with more than eight electrons