Alkali metals, group 1 in the Periodic Table of Mendeleev.
Alkali metals, group 1 in the periodic table of Mendeleev.
The two most common alkali metals are sodium and potassium. They are found in many compounds and minerals, and are essential for various biological processes in living organisms.
Potassium and lithium.
Lithium, sodium, and potassium react vigorously with water to form hydroxides and release hydrogen gas. The reactivity increases as you go down the group from lithium to potassium, with potassium being the most reactive.
Potassium
Iron is the odd one out because it is a transition metal, while lithium, potassium, and sodium are alkali metals.
Color is determined by the respective cation: Potassium - lilac Sodium - yellow Lithium - red
group 1
sodium-yellow lithium-red barium-apple green copper-dark green calcium-brick red
They explode and combust.
1. Sodium, lithium, potassium
Potassium is the most radioactive among lithium, sodium, and potassium. Potassium has a naturally occurring radioactive isotope, potassium-40, which is present in all potassium samples and contributes to its radioactivity.