Reactivity of Alkali Metals

Which alkali metal is most reactive?

• Li

• Na

• K

• Cs

Why does potassium react more violently than lithium?

• Because Potassium has a higher melting point than Li

• Because potassium has a small atomic size than Li

• Because the electron in potassium is easily lost cause its further away from nucleus

What gas is produced when alkali metals react with water?

• Carbon dioxide

• Hydrogen

• Oxygen

• Chlorine

Which alkali metal property increases as you move down the group?

• Melting point

• Density

• Reactivity

• Hardness

Which statement about electronic configuration and reactivity is correct?

• More electron shells make it easier to lose an electron.
  

• Alkali metals gain electrons easily.
  

• Down the group, atoms hold onto their outer electrons more tightly.
  

• Francium is less reactive than lithium