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week3 - Chemistry 1P Discussion Week 3 Atoms Ions and...

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Chemistry 1P Discussion Week 3: Atoms, Ions, and Molecules 1) For each atom or ion given below, give the number of protons, neutrons, and electrons (hint: use the periodic table). a) 17 39 Cl b) 74 186 W c) 16 33 S 2 d) 56 130 Ba 2 + e) A bromine-80 ion: f) An aluminum-27 ion: 2) a) What is the formula for the ionic compound formed from Al 3+ and F - ions? What is this compound called? b) What is the formula for the ionic compound formed from ammonium and iodide ions? What is this compound called? c) What is the formula for the ionic compound formed by calcium ions and phosphate ions? What is this compound called? d) What is the formula for the ionic compound formed by Fe 2+ and O 2- ions? What is this compound called?
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Chemistry 1P Discussion Week 3: Atoms, Ions, and Molecules 3) The element silicon has three naturally occurring isotopes: 28 Si, 29 Si, and 30 Si. a) Find the number of protons, neutrons, and electrons in each isotope. b) Given the following information about the actual atomic mass and relative abundance of each isotope, calculate the average atomic mass of silicon.
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