The first element in a period is an alkali metal.
alkali metal
Metal
The first element in the fourth period, which is used in making fertilizer, is potassium.
Sodium
potassium :D
A chemical symbol refers to a chemical element; the first letter of a symbol depends on the chemical element.
If the first element in it is a cation, it is just about always an ionic compound.
The first element in the fourth period of the periodic table is potassium (K).
The first element in period three of the periodic table of chemical elements is sodium (Na).
The first element in the fourth period of the Periodic Table is potassium (K).
Hydrogen
hydrogen
Potassium
it must be 12.
The first element in the fourth period, which is used in making fertilizer, is potassium.
Potassium (K)
It is potassium.
potassium
The A is Potassium