Chem quiz 1

Chem quiz 1 - Fe O 2 Fe 2 O 3 3 The volume of an atom is...

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Quiz 1 – 15 min You can use a simple calculator, but no written material of any kind (computer, book, notes, cell phones, text entered/stored in your calculator, etc.) Be sure to write your name!! Show your work!! 1. How many neutrons, protons and electrons are there in one atom of the following isotope of neon? 21 Ne ? (Remember there is a periodic table in the lecture hall!) 2. Balance the following reaction:
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Unformatted text preview: Fe + O 2 Fe 2 O 3 3. The volume of an atom is primarily defined by electrons. Calculate the density of the electrons for the ion, 7 Li + in g/cm 3 given that the mass of an electron is 9.1×10-28 g, and the radius ( r ) of the atom is 9.0×10-9 cm. Assume the ion is a sphere, and the volume of a sphere is: ( π = 3.14) 3 3 4 r V π =...
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