Answer
(a) Mercury (Hg)
(b) Platinum (Pt)
(c) Osmium (Os)
(d) Bismuth (Bi)
Work Step by Step
The identity of an element is given by its atomic number; therefore, we just have to determine them in each case and use a periodic table to get the correct answer.
** The atomic number (Z) is the bottom left number of the symbol.
(a) Z = 80; Mercury (Hg)
(b) Z = 78; Platinum (Pt)
(c) Z = 76; Osmium (Os)
(d) Z = 83; Bismuth (Bi)
