Are all the reactivity series metal?

hi here is your answer hope it helps or then sry

Explanation:

metals can replace hydrogen from various acids like hydrochloric acid, dilute sulfuric and nitric acids. Oxides of these metals undergo reduction when heated with hydrogen gas, carbon, or carbon monoxide. Till copper, metals can combine directly with oxygen and form a metal oxide. Elements present at the bottom from mercury to gold are often found in the native form in nature and their oxides show thermal decomposition under mild conditions.

gravity causes stares to cluster i think so