Wow! What do you mean "when elements react", specifically, which elements? Here are the basic reactions though: Combustion:fuel + oxygen -> oxides + energy Synthesis: A + B -> AB Decomposition: AB -> A + B Single Displacement:one element replaces another from a compound: Z + AB -> ZB + A Double Displacement: Elements in different compounds exchange places: AB + XY -> AY + XB ***Smartiiz***
This is a synthesis reaction.
A typical eaxample is the synthesis of ammonia: N2 + 3 H2 = 2 NH3; many other synthesis reaction are known.
This catalyzed reaction is the base of the ammonia industry.
Endothermic reaction
When water is removed, dehydration is a type of reaction that occurs.
Aluminium react with sodium hydroxide.The reaction is:2 Al + 2 NaOH + 2 H2O = 2 NaAl(OH)4 + 3 H2
This is a thermal degradation reaction.
A fusion reaction.
Endothermic reaction
a displacement reaction
When water is removed, dehydration is a type of reaction that occurs.
Aluminium react with sodium hydroxide.The reaction is:2 Al + 2 NaOH + 2 H2O = 2 NaAl(OH)4 + 3 H2
This is a thermal degradation reaction.
A fusion reaction.
A neutralization reaction
cool
These compounds doesn't react.
This is a thermal degradation reaction.
Decomposition.
This is an endothermic reaction.