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(04.02 MC) The table shows the number of reactants and products present during two separate chemical reactions. Chemical Change Comparison Chemical Reaction Reactants Products A 1 3 B 2 1 Which of the following statements correctly identifies the decomposition reaction and describes a substance involved?

(02.07 MC) Read the given expression.X = atomic number − number of core electronsWhich of the following explains the identity of X and its trends down a group?

(03.05 LC) A molecule has four bonded atoms around a central atom. The central atom does not have any lone pairs of electrons. What is the geometry of the molecule?

(03.02 MC) Four students wrote different analogies to describe an electron before the formation of an ionic bond.Student A: A tug of war between two wrestlers each weighing 460 lbsStudent B: A dog and his owner tugging at a frisbeeStudent C: A big, greedy dog stealing away a bone from a smaller dogStudent D: Children exchanging their orange and strawberry flavored popsiclesWhich student presented a correct analogy?

(03.03 MC) A template of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is shown.Which of the following characteristics can be written only in space B?

(02.07 MC) Read the given expression.Effective nuclear charge = atomic number − XWhich of the following explains the identity of X and its trends across a period?

(02.04 MC) An atom’s configuration based on its number of electrons ends at 3p4. Another atom has seven more electrons. Starting at 3p, what is the remaining configuration?

(03.02 LC) Which of the following polyatomic ions will form an ionic compound with a single sodium ion?

(02.04 MC) An atom’s configuration based on its number of electrons ends at 3p3. Another atom has nine more electrons. Starting at 3p, what is the remaining configuration?

(01.07 HC) A student collected the data shown in the table below during an experiment. Liquid Characteristics Liquid Characteristics Boiling Point Freezing Point Color Rate of Evaporation Mercury 357 °C −39 °C shiny silver gray negligible Alcohol 78 °C −115 °C colorless rapid Based on the data, which of the following conclusions can be made about the use of mercury and alcohol thermometers?