What does a Lewis structure NOT show? a. nonbonding electrons b. three-dimension
ID: 534896 • Letter: W
Question
What does a Lewis structure NOT show? a. nonbonding electrons b. three-dimensional molecular shape c. charges (when applicable) d. bonding of atoms e. bonding arrangement of atoms Which arrangement is in the correct order of decreasing radii? a. Na^+ > Cs^+ > I^- b. Li^+ > Na^+ > K^+ c. Be > Ba^+ > O^2- d. As^3- > Br^- > K^+ e. F^- > Mg^+ > Cs Which of the following is quantized? a. the speed of a Formula 1 race car b. your age c. the diameter of a redwood tree d. the number of marbles in a bag e. the trajectory of a baseball hit from home plateExplanation / Answer
8) VSEPR theory, along with hybridization is used to predict molecular shapes. The Lewis theory gives us idea about the number of bonding and non-bonding electrons on an atom, the placement of atoms in a molecule and charge(s) on an atom, if present. Hence, (b) is the correct answer.
Ans: (b)
9) Na and Cs occur in the same group, with Na being above Cs in the periodic table. Hence, Cs+ will have a larger ionic radius than Na+; therefore, (a) is incorrect.
Li occurs above Na and will have a smaller radius than Na, thus (b) is incorrect.
Be occurs above Ba in the periodic table, hence Ba+ will have a larger radius than Be. Therefore, (c) is incorrect.
F occurs at the topmost right corner of the table and will have the smallest ionic radius; thus the order (e) is incorrect.
This leaves us with (d) as the only correct option.
Ans: (d)
10) We refer to a quantity as being quantized only when the quantity can be increased in discreet amounts, i.e, as whole integer values. Of the options given here, we can only have a quantized amount of marbles in a bag. This means we can only have either 20 marbles or 21 marbles, but we cannot have 20.63 marbles in a bag. Therefore, (d) is the correct option.
Ans: (d)
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