Problem 104
Of the elements \(\mathrm{F}, \mathrm{Br}, \mathrm{Cl}, \mathrm{I}\), which a. is the largest atom? b. is the smallest atom? C. has the lowest ionization energy? d. requires the most energy to remove an electron? e. is found in Period \(4 ?\)
Problem 107
Give the symbol of the element that has the a. smallest atomic size in Group \(6 \mathrm{~A}(16)\) b. smallest atomic size in Period 3 c. highest ionization energy in Group \(5 \mathrm{~A}(15\) d. lowest ionization energy in Period 3 e. most metallic character in Group \(2 \mathrm{~A}(2)\)
Problem 109
A lead atom has a mass of \(3.4 \times 10^{-22} \mathrm{~g} .\) How many lead atoms are in a cube of lead that has a volume of \(2.00 \mathrm{~cm}^{3}\) if the density of lead is \(11.3 \mathrm{~g} / \mathrm{cm}^{3}\) ?
Problem 110
If the diameter of a sodium atom is \(3.14 \times 10^{-8} \mathrm{~cm}\), how many sodium atoms would fit along a line exactly 1 inch long?
Problem 111
Silicon has three naturally occurring isotopes: Si-28 (27.977 amu) with an abundance of \(92.23 \%\), Si-29 (28.976 amu) with a \(4.68 \%\) abundance, and Si-30 (29.974 amu) with a 3.09\% abundance. What is the atomic mass of silicon?
Problem 112
Antimony (Sb), which has an atomic weight of \(121.75\) amu, has two naturally occurring isotopes: Sb-121 and Sb-123. If a sample of antimony is \(42.70 \% \mathrm{Sb}-123\), which has a mass of \(122.90 \mathrm{amu}\), what is the mass of Sb-121?
