2
The melting and boiling points of the group 1 elements are shown in the table below.
Group 1
Melting point
(°C)
282
Boiling point
(°C)
1342
Li
Na
98
???
K
???
760
Rb
39
686
One melting point in the table is missing. Which of the following temperatures is it most
likely to be?
63°C
B 42°C
C 100°C
D 232°C