about alkali metals

Alkali metals : lithium (Li), sodium (Na), potassium (K), rubidium (Rb), casesium (Cs)

Action on dilute hydrochloric acid (cold):
Lithium reacts with dilute hydrochloric acid vigorously. All other alkali metals react with dilute hydrochloric acid explosively.

Action on water :
Lithium reacts slowly with cold water, but vigorously with steam. Sodium and potassium react with cold water vigorously, but explosively with steam. Rubidium and caesium react with cold water explosively.

OH- + H+ --> H2O

will not explode

but this is exothermic reaction

咁要看你係咩metals~
在金屬13種中，頭2隻會explode，之後6隻有反應，再之後o個d就冇反應la~
water就要看係熱的冷了~
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