I have been teaching science in both a brick and mortar and online setting for 5 years. I have a biology and chemistry endorsement. About a year ago I finished a master's degree in Biology and just recently started a PHD.
Knowledge/ComprehensionPlastids that are surrounded by more than two membranes are evidence of(A) evolution from mitochondria.(B) fusion of plastids.(C) origin of plastids.(D) origin of the plastids from archaea.(D) secondary endosymbiosis.
Give three ions that are isoelectronic with neon. Place these ions in order of increasing size.
Consider the ions $\mathrm{Sc}^{3+}, \mathrm{Cl}^{-}, \mathrm{K}^{+}, \mathrm{Ca}^{2+},$ and $\mathrm{S}^{2-} .$ Match theseions to the following pictures that represent the relative sizes of the ions.
For each of the following groups, place the atoms and/or ions in order of decreasing size.a. $\mathrm{V}, \mathrm{V}^{2+}, \mathrm{V}^{3+}, \mathrm{V}^{5+}$b. $\mathrm{Na}^{+}, \mathrm{K}^{+}, \mathrm{Rb}^{+}, \mathrm{Cs}^{+}$c. $\mathrm{Te}^{2-}, \mathrm{I}^{-}, \mathrm{Cs}^{+}, \mathrm{Ba}^{2+}$d. $P, P, P^{2}, P^{3}$e. $\mathrm{O}^{2-}, \mathrm{S}^{2-}, \mathrm{Se}^{2-}, \mathrm{Te}^{2-}$
Which compound in each of the following pairs of ionic substances has the most negative lattice energy? Justify your answers.a. NaCl, KClb. LiF, LiClc. $\mathrm{Mg}(\mathrm{OH})_{2}, \mathrm{MgO}$d. $\mathrm{Fe}(\mathrm{OH})_{2}, \mathrm{Fe}(\mathrm{OH})_{3}$e. $\mathrm{NaCl}, \mathrm{Na}_{2} \mathrm{O}$f. $\mathrm{MgO}, \mathrm{BaS}$
Which compound in each of the following pairs of ionic substances has the most negative lattice energy? Justify your answers.a. LiF, CsFb. NaBr, NaIc. $\mathrm{BaCl}_{2}, \mathrm{BaO}$d. $\mathrm{Na}_{2} \mathrm{SO}_{4}, \mathrm{CaSO}_{4}$e. $\mathrm{KF}, \mathrm{K}_{2} \mathrm{O}$f. $\mathrm{Li}_{2} \mathrm{O}, \mathrm{Na}_{2} \mathrm{S}$
