(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?

(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 Expansion per Degree Change in Temperature Mercury 357 °C −39 °C shiny silver gray relatively lower Alcohol 78 °C −115 °C colorless relatively higher Based on the data, which of the following conclusions can be made about the use of mercury and alcohol thermometers?

(02.01 HC) Rutherford created a planetary model for atoms after his experiments. Imagine if Rutherford’s idea that electrons radiate energy while orbiting around a nucleus was true. Which other model or scientific idea would have been strengthened by this?

(01.07 LC) A metal rod with a length of 4.66 cm was measured using four different devices. Which of the following measurements is the most accurate?

(02.01 MC) The diagram shows the different models of the atom that eventually led to the modern atomic theory.Which model was proposed as a result of Rutherford’s scattering experiment where positive particles did not pass straight through a foil as expected?

(01.05 MC) Two changes are described below. Ice melts to form water. Sugar cubes dissolve in hot coffee. Which statement is true about the two changes?

(01.05 MC) Two changes are described below. Water vapor condenses. Liquid water separates into hydrogen and oxygen. Which statement is true about the two changes?

(01.04 MC) A student described two properties of a substance as shown. Properties of Substance Property Description A The substance can be hammered into a flat sheet. B The density of the substance is one-third of the density of iron. Which of the following statements is true about the two properties described in the table?