Cracking the AP Chemistry Exam, 2013 Edition by Princeton Review

By Princeton Review

If you want to comprehend it, it’s during this book. Cracking the AP Chemistry, 2013 variation includes:

   • 2 full-length perform assessments with certain explanations
   • Thorough topic stories of all themes, together with atomic constitution, thermodynamics, the periodic desk, basic legislation, natural chemistry, molecular binding, and key equations, legislation & formulas
   • Helpful tables, charts, and diagrams
   • Detailed suggestion on the right way to write a high-scoring essay
   • Updated suggestions which replicate the AP try out scoring switch

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Additional info for Cracking the AP Chemistry Exam, 2013 Edition

Example text

Each inner shell shields the more distant shells from the nucleus, reducing the pull of the nucleus on the valence electrons and making them easier to remove. Protons are also being added, but the shielding effect of the negatively charged electron shells cancels out the added positive charge. The Second Ionization Energy Is Greater than the First Ionization Energy When an electron has been removed from an atom, electron-electron repulsion decreases and the remaining valence electrons move closer to the nucleus.

The molar mass of an element will give you a pretty good idea of the most common isotope of that element. 0 and about 99 percent of the carbon in existence is carbon-12. The horizontal rows of the periodic table are called periods. The vertical columns of the periodic table are called groups. ELECTRONS QUANTUM NUMBERS The positions of the electrons in relation to the nucleus are described by their quantum numbers. Each electron has four quantum numbers that apply to its shell, subshell, orbital, and spin.

Grading these tests is hard work. Breaking a question into parts in this way makes it easier on the grader, who must match your response to a set of guidelines he or she has been given that describe how to assign partial and full credit. Each grader scores each test based on these rough guidelines that are established at the beginning of the grading period. For instance, if a grader has 3 points for the question about ionization energies, the points might be distributed the following way: One point for understanding ionization energy.

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