How can you find out Metal Ions? -Lithium? -Sodium? -Potassium? -Calcium? -Copper?

-Simply put the Substance in the Flame, and use the Colour to see what Element it would Refer to -Lithium, L+, gives a Crimson Red Flame -Sodium, Na+, gives a Yellow Flame -Potassium, K+, gives a Lilac Flame -Calcium, Ca²+, gives a Brick Red Flame -Copper, Cu²+, gives a Blue-Green Flame