Question

what happen when active metals react with oxygen? give two examples.​

Answer 1

Answer:

Exceptions to its predictions arise, however, when very active metals react with oxygen, which is one of the most reactive nonmetals. Lithium is well behaved. It reacts with O2 to form an oxide that contains the O2- ion.

...

Active Metals and Ammonia.

2 [K K+ + e-]

2 K + 2 NH3 2 K+ + 2 NH2- + H2

Answer 2

Many metals react with oxygen to form metal oxides. Potassium and sodium are soft metal which are easily cut exposing a shiny surface which changes to dull rapidly. The change from shiny to dull is called tarnishing. Potassium burns with a lilac flame when heated in air.

plz plz mark me brainlist ;-).good night.