How many elements have been identified?
a. 92
b. 104
c. 114
d. over 200
e. none of the above
Question 2
What elements do the symbols Fe, Na, Au, and Hg stand for?
a. aluminum, nitrogen, silver, tungsten
b. iron, sulfur, silver, ytterbium
c. iron, sodium, silver, mercury
d. iron, sodium, gold, mercury
e. none of the above