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reviewfinal - Review for Final Chapters 2 3 and 4 1 2 3...

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Review for Final Chapters 2, 3, and 4 1. Give the correct symbol for the following: (a) sodium (b) magnesium (c) Iron (d) lithium (e) chlorine (f) carbon 2. Which are homogeneous? (a) salt and pepper (b) Tea and water solution (c) Sodium (d) Carbon dioxide (e) Sand and water 3. Which are physical properties? (a) it has a yellow color (b) it burned in the presence of oxygen (c) It has a density of 3g/ml (d) it freezes at 2 o C (e) It reacted chemically with magnesium (f) salt dissolves in water 4. Which of the following is a pure substance: (a) salt water solution (b) Oxygen (c) Sodium Chloride (d) Eggs (e) Dirt 5. Which is a homogeneous mixture: 6. Are the following elements or compounds: (a) carbon dioxide (b) iron (c) lead (d) water (e) iron oxide (f) xenon hexafluoride Chapters 5 and 6 7. 2 Li 2 SO 4 How many Li____ S _____ O______ 3(NH 4 ) 2 NO 3 How many N______H______O_______ How many total atoms in (NH 4 ) 2 SO 4 ? 8. How many protons, neutrons, and electrons in: (a) Na p____n____e____ (b) Cl - p_____n______e______ (c) Ca 2+ p____n_____e______ 9. Write the noble gas configuration for S and Tc. 10. Write the total electron configuration for Rh. 11. Considering the 3 rd energy level: (a) how many sublevels and what are they (b) how many electrons can it contain 12. How many valence electrons in : (a) S (b) Ge 13. The atomic number for Ca is ____ and represents___________. The atomic mass or mass number is ____ and represents_________________.
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14. What is the noble gas configuration for Fe 2+ and S 2- ? 15. The word atom means the charge is _______ and it has equal___________________. 16. The word ion means_______ and it has unequal________________________.
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