Chapter 2: Q65P (page 83)
Are ions present in a sample ? Explain.
Short Answer
There are no ions present in a sample because it is a molecule (covalent compound).
Chapter 2: Q65P (page 83)
Are ions present in a sample ? Explain.
There are no ions present in a sample because it is a molecule (covalent compound).
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(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 ________.
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.
(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.
Give the name, atomic symbol, and group number of the element with the following Z value, and classify it as a metal, metalloid, or nonmetal:
(a) Z = 32 (b) Z = 15 (c) Z = 2 (d) Z = 3 (e) Z = 42
Zinc sulfide (ZnS) occurs in the zinc blend crystal structure.How many kilograms of Zn are in 3.82 kg of ZnS?
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