It can be found in bananas  and orange juice.
The flame test for this element is a light purple color, but it can be masked by other  colors. Common salts of this element include carnallite and sylvite. This element has  the fourth lowest first ionization energy due to its placement on the periodic table,  and, after lithium, the second lowest density for metals. It is important for proper  cell function, nerve impulses, and muscle contraction. It can be found in bananas  and orange juice. FTP, name this element with an atomic number of 19 that is found  in potash.
The flame test for this element is a light purple color, but it can be masked by other  colors.
Potassium