Using the trends in the periodic table, rank the following atoms in order of increasing electronegativity. Rb, Na, K
The trend in electronegativity of elements in the periodic table generally increases from left to right across a period and from bottom to top within a group.
Given that Rb, Na, and K are all in the same group (Group 1), their electronegativities will increase from bottom to top.
So, the ranking of the atoms in order of increasing electronegativity would be:
K < Na < Rb