Question

bohr model of nacl lewis dot structure of nacl select the true statements. valence electrons are shown in the lewis dot structure of a chloride anion. valence electrons are shown in the bohr model of a sodium cation. both the bohr model and the lewis dot structure represent an ionic bond between a metal and a nonmetal. a sodium cation has zero valence electrons.

Explanation:

1. Valence electrons in Lewis dot of chloride anion: Lewis dot structures show valence electrons (dots around the symbol). Chloride anion (\(Cl^-\)) has 8 valence electrons (gained 1), so this is true.
2. Valence electrons in Bohr model of sodium cation: Sodium cation (\(Na^+\)) loses its 1 valence electron (from the outermost shell). The Bohr model here shows the remaining shells (no valence electrons in the outermost shell of the cation), so this statement is false (the checkmark is incorrect).
3. Ionic bond representation: NaCl is ionic (metal Na + nonmetal Cl). Both models (Bohr shows electron transfer, Lewis shows ion charges) represent the ionic bond, so this is true.
4. Sodium cation valence electrons: \(Na^+\) has lost its 1 valence electron, so its outermost shell (now the second shell) has 8 electrons (full), meaning 0 valence electrons (valence electrons are in the outermost shell). This is true.

Answer:

• Valence electrons are shown in the Lewis dot structure of a chloride anion. (True)
• Valence electrons are shown in the Bohr model of a sodium cation. (False, should be unchecked)
• Both the Bohr model and the Lewis dot structure represent an ionic bond between a metal and a nonmetal. (True)
• A sodium cation has zero valence electrons. (True)

(Note: The second statement was incorrectly checked; the correct true statements are the first, third, and fourth, plus the second is false.)