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Chapter 2: Q4.69P (page 40)
Give the oxidation number of phosphorus in the following:
You need to provide the oxidation no of phosphorus for the given compounds.
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Fill in the blanks:
(a) The symbol and atomic number of the heaviest nonradioactive noble gas are ________and ________.
(b) The symbol and group number of the Period 5 transition element whose atoms have the fewest protons are ________and ________.
(c) The elements in Group 6A(16) are sometimes called the chalcogens.The symbol and atomic number of the first metallic chalcogen are ________and ________.
(d) The symbol and number of protons of the Period 4 alkali metal atom are ________and ________.
Give the name and formula of the compound formed from the following elements
a.
b.
c.
(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.
List two differences between a compound and a mixture.
State the mass law(s) demonstrated by the following experimental results, and explain your reasoning:
Experiment 1: A student heats 1.27 g of copper and 3.50 g of iodine to produce 3.81 g of a white compound; 0.96 g of iodine remains.
Experiment 2: A second student heats 2.55 g of copper and 3.50 g of iodine to form 5.25 g of a white compound, and 0.80 g of copper remains.
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