AP Chemistry Taylor Unit 1 Progress Check FRQ Scoring Guide 2023.

For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate. Answer the following questions related to . (a) In terms of atomic structure, explain why the atomic radius of is larger than that of . Please respond on separate paper, following directions from your teacher. (b) In terms of atomic structure, explain why the first-ionization energy is less than that of . Please respond on separate paper, following directions from your teacher. (c) forms the compound , which is an ionic compound that is brittle. Identify another element, , that is likely to form a brittle, ionic compound with the formula . Justify your answer in terms of periodic trends. Please respond on separate paper, following directions from your teacher. (d) The compound also exists. A chemist can determine the mass of in a sample of known mass that consists of either pure or pure . From this information, can the chemist answer the question of which compound is in the sample? Indicate yes or no, and explain. Please respond on separate paper, following directions from your teacher. Part (a) Select a point value to view scoring criteria, solutions, and/or examples and to score the response. AP Chemistry Scoring Guide Unit 1 Progress Check: FRQ 0 1 The response indicates one of the following: that the valence electrons of are in a higher energy shell than those of are that the outer orbitals have a higher principal quantum number in than in that the valence electrons of are less attracted to the nucleus than those of Part (b) Select a point value to view scoring criteria, solutions, and/or examples and to score the response. 0 1 The response indicates that the first ionization energy of is less than that of because the electron removed from is less strongly attracted to (and thus more easily removed from) the nucleus, which has fewer protons than . Part (c) Select a point value to view scoring criteria, solutions, and/or examples and to score the response. 0 1 The response meets both of the criteria below: AP Chemistry Scoring Guide Unit 1 Progress Check: FRQ