Answer:
The second one is the answer
francium , in the Periodic table the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. making helium is the smallest element, and francium the largest.
Salt water is a solution.
A solution is defined as a mixture where one of the substances dissolves in the other (salt dissolves in water)
You can check this by Googling"difference between mixture and solution", where the first thing that comes up are the words that "an example of a solution is salt water".
