Basic Chemistry Practice PDF

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Basic Chemistry Practice...

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Basic Chemistry Practice

Work through these practice problems. Show all work and check your periodic table for necessary information. 1. Atoms and Elements a. How many protons are in a chlorine atom? b. How many protons are in a titanium atom? c. What element has 80 protons? d. What element has 94 protons? e. f. g. h.

What is the atomic mass of nitrogen? What element has an atomic mass of 32.06? If the mass number of fluorine is 19, how many neutrons does it contain? What is the mass number of cobalt if it contains 27 protons and 32 neutrons?

How many electrons are in a Mg2+ atom? How many electrons are in a Boron atom? How many electrons are in a O2- atom? How many electrons does carbon need to gain or lose to be happy (have a full outer shell)? m. How many electrons does oxygen need to gain or lose to be happy (have a full outer shell)? n. How many electrons does Ca2+ need to gain or lose to be happy (have a full outer shell)? i. j. k. l.

2. Bonding a. Show the ionic bond between potassium and fluorine. b. Show the ionic bond between magnesium and chlorine (you’ll need two chlorines). c. Show the covalent bond that forms Cl 2. d. Show the covalent bond that forms H 2S. e. Show the covalent bond that forms CO2. (this is a tough one) 3. Balancing Chemical Equations. a. Circle the products and put a square around the reactants in the following equation: CO2 + H2O  C6H12O6 + O2 b. Balance these equations: i. Na + Cl2  NaCl ii. CO2 + H2O  C6H12O6 + O2 iii. C3H8 + O2  CO2 + H2O iv. KClO3 + C12H22O11  KCl + CO2 + H2O v. C2H4 + HCl  C2H5Cl...