This metal is gold.
The most reactive metal is francium.
No, Potassium is one of the most reactive metals.
Fluorine is the most reactive non-metal.
The placement of the elements from least reactive to most reactive is xenon, nickel, and then lithium. Xenon is a noble gas and is generally unreactive, while nickel, a transition metal, has moderate reactivity. Lithium, an alkali metal, is highly reactive, especially with water and air.
The least reactive is bromine.
caesium is the most reactive non-radioactive metal and Florine is the most reactive non-metal, but francium is the most reactive, radioactive metal
Gold
calcium
Platinum
Gold is least reactive with aqueous solutions of metal ions among tin, zinc, gold, and calcium. Gold is a noble metal and does not readily react with most common reagents, including aqueous solutions of metal ions.
Metals which can easily loose electron are most reactive. They are present in group-1.
fluorine is the most reactive non metal in the periodic table.