The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (a) How many protons, electrons, and neutrons are in an 266Sg atom?
Calculate the value of the silver in the American Silver Eagle coin, assuming its thickness is uniform, given that it has a diameter of 41 mm, a thickness of 2.5 mm, a silver density of 10.5 g/cm3, and the approximate market price of silver is $0.51 per gram.

The first atoms of seaborgium (Sg) were identified in 1974. The longest-lived isotope of Sg has a mass number of 266. (b) Atoms of Sg are very unstable, and it is therefore difficult to study this element's properties. Based on the position of Sg in the periodic table, what element should it most closely resemble in its chemical properties?
From the molecular structures shown here, identify the one that corresponds to each of the following species: (a) chlorine gas; (b) propane; (c) nitrate ion; (d) sulfur trioxide; (e) methyl chloride, CH3Cl.
Fill in the blanks in the following table:
Cation Anion Formula Name
Lithium oxide
Fe2+ PO43-
Al2(SO4)3
Copper(II) nitrate
Cr3+ I−
MnClO2
Ammonium carbonate
Zinc perchlorate
Complete the first column of the table.