The concept that most of the atom's mass is concentrated in a small nucleus surrounded by electrons was the contribution of ___.

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

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