Chapter 2: Q1P (page 81)
What is the key difference between an element and a compound?
An element is made up of the same type of atoms while a compound is formed by combining different elements in a fixed ratio.
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The tap water found in many areas of the United States leaves white deposits when it evaporates. Is this tap water a mixture or a compound? Explain.
Argon has three naturally occurring isotopes, 36Ar,38Ar, and
40Ar. What is the mass number of each? How many protons, neutrons, and electrons are present in each?
A compound of iodine and cesium contains 63.94 g of metal and 61.06 g of nonmetal. How many grams of cesium are in38.77 g of compound? How many grams of iodine?
(a) Does the percent by mass of each element in a compound depend on the amount of compound? Explain.
(b) Does the mass of each element in a compound depend on the amount of compound? Explain.
Does the percent by mass of each element in a compound depend on the amount of that element used to make the compound? Explain.
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