(a) Ethanoic Acid: Imagine carbon with 4 balls (electrons), hydrogens with 1 ball each, and oxygen with 6 balls. Oxygen shares 2 with carbon (double bond), 1 with hydrogen, and the rest stay around oxygen. One hydrogen loses its ball to become H+.
(b) Hydrogen Sulfide: Sulfur has 6 balls, hydrogens have 1 each. Sulfur shares 1 ball with each hydrogen to make two single bonds.
(c) Propanone: 3 carbon atoms each share 4 balls. One oxygen shares 2 with a carbon (double bond) and keeps 4 around itself. Hydrogens each share 1 ball with a carbon.
(d) Fluorine: Each fluorine has 7 balls. They share 1 ball each to hold hands.
MCQs Based on the above question
Question 1:What is the correct electron dot structure for ethanoic acid?
a) Carbon is double bonded to an oxygen atom and single bonded to a hydroxyl group (OH).
b) Carbon is triple bonded to an oxygen atom and single bonded to two hydroxyl groups (OH).
c) Carbon is single bonded to two oxygen atoms and one hydrogen atom.
d) Carbon is double bonded to two oxygen atoms and no hydrogen atoms.
Answer: a) Carbon is double bonded to an oxygen atom and single bonded to a hydroxyl group (OH).
Question 2: How are the electrons distributed in the electron dot structure of hydrogen sulfide?
a) Sulfur is bonded to two hydrogen atoms with double bonds.
b) Sulfur is bonded to two hydrogen atoms with single bonds.
c) Sulfur is bonded to one hydrogen atom with a double bond and one with a single bond.
d) Sulfur is not bonded to any hydrogen atoms.
Answer: b) Sulfur is bonded to two hydrogen atoms with single bonds.
Question 3: Which statement best describes the electron dot structure of propanone?
a) The central carbon atom is double bonded to an oxygen atom and single bonded to two hydrogen atoms.
b) The central carbon atom is double bonded to an oxygen atom and single bonded to two other carbon atoms.
c) The central carbon atom is single bonded to an oxygen atom and double bonded to two other carbon atoms.
d) The central carbon atom is not bonded to an oxygen atom.
Ans: b) The central carbon atom is double bonded to an oxygen atom and single bonded to two other carbon atoms.
Question 4: What is the nature of the bond in the electron dot structure of fluorine (F2)?
a) Each fluorine atom shares two electrons with the other fluorine atom.
b) Each fluorine atom shares one electron with the other fluorine atom.
c) Each fluorine atom does not share any electrons with the other fluorine atom.
d) Each fluorine atom shares three electrons with the other fluorine atom.
Answer: b) Each fluorine atom shares one electron with the other fluorine atom.