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Mastering Atomic Structure and Energy Levels: Practice Problems and Solutions for Chemistry

This comprehensive set of practice problems covers key concepts in atomic structure, electron configurations, and energy levels. Engage with challenging questions focusing on atomic mass, sublevel configurations, and the behavior of electrons during energy absorption. Topics include isotopes, electron transitions, and orbital shapes. Ideal for students seeking to strengthen their chemistry skills, this resource provides clear answers and explanations to enhance understanding and retention of complex topics in atomic theory.

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Mastering Atomic Structure and Energy Levels: Practice Problems and Solutions for Chemistry

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  1. Skills Practice Answers

  2. Skills Practice 1 • 9,434,880 mL • 17.8 cases • 0.333 pallet • a) 0.1560 m b) 4.1x1010 c) 92,000 μm d) 91,600 nm • a) 2.229x107 b) 8.07x106 c) 5.41x1020 d) 1.12x107 • a) 2.300021x1010 b) 3.51x10-9 • a) 235,400 b) 0.000000003400

  3. Skills Practice 2 • 325.2 • 18,000 • 0.0175 • 0.790 • 28,910,000 • 27 • 4.9x1012 • 1.86x105

  4. Skills Practice 8 • a) 21 b) Scandium (Sc) c) 22 • Atoms of the same element (having the same number of protons) with a different number of neutrons. • a) -2 b) sulfur c) 17 • 1;3 • +2 • 30 • B) ions • Strontium (Sr)

  5. Skills Practice 9 • a) 74.92 amu b) Arsenic (As) • a) 51.99 amu b) Chromium (Cr) • The most abundant is the one with a mass of 40.00 amu. • 41.996 amu

  6. Skills Practice 10 • Ground state: the normal energy level that an electron occupies. Excited state: when an electron has absorbed energy to occupy a higher energy level. • 7.11x10-8 m • 8.62x10-20 J • 3.68x10-19 J • a) 8.52x1014 Hz b) 5.65x10-19 J • f=7.68x1014 Hz wavelength= 3.91x10-7 m

  7. Skills Practice 11 • There is no such thing as an f sublevel in the third energy level. Also, an f sublevel if it existed would have seven orbitals instead of four. • 8 • 10 • 2 • Orbitals = 9 Electrons =18 • 50 • 4p

  8. Skills Practice 13 • a. ends in: 3d b. ends in: 4d c. ends in: 4p 2) a. 1s22s22p63s23p64s23d4 b. 1s22s22p63s23p64s23d104p65s24d105p3 c. 1s22s22p63s23p64s2 3) Because of Hund’s Rule the 2p sublevel should look like: 1s 2s 2p 4) Three

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