Question

question 7 (2 points)
(03.04 lc)
which phrase best describes the bond in o₂?
o a double covalent bond
o b single covalent bond
o c double ionic bond
o d single ionic bond
question 8 (2 points)
(03.04 lc)
look at this image.
what do the two sets of free dots in this image represent?
o a ionic bonds in water
o b covalent bonds in water
o c shared valence electrons
o d non - bonded valence electrons

Explanation:

• For Question 7:
• In \(O_2\), oxygen atoms share electrons. Since each oxygen atom has 6 valence electrons and needs 2 more to complete the octet, they share 2 pairs of electrons. A covalent bond is formed when electrons are shared. A double bond is when 2 pairs of electrons are shared. Ionic bonds involve transfer of electrons (not the case in \(O_2\) as it is a non - metal - non - metal bond).
• For Question 8:
• In the water (\(H_2O\)) molecule shown, the bonds between \(O\) and \(H\) are covalent (shared electrons, represented by the lines). The free dots are not involved in bonding. Valence electrons are the outermost electrons. Non - bonded valence electrons are those that do not participate in the covalent bond formation. Ionic bonds (transfer of electrons) are not present in water (a covalent compound). Shared valence electrons would be represented by the lines (the covalent bonds) between \(O\) and \(H\).

Answer:

Question 7: A. Double covalent bond
Question 8: D. Non - bonded valence electrons