What is meant by the term symbol of an element?

In chemistry, an element symbol usually refers to the one- or two-letter abbreviation for a chemical element, though the term also can be applied to the alchemical symbols.

Explanation:

An element symbol is a one- or two-letter abbreviation for a chemical element name. 

here is table 2-2:

country

percent of eligible voters that voted

rank

united states

44.9%

138

canada

60.1%

107

costa rica

84.6%

14

hungary

66.9%

82

japan

57.0%

118

egypt

27.7%

159

south africa

85.5%

10

ans is no, the data set cannot be plotted as a single circle graph