Question

How many valence electrons are in alkali metals?

Answer 1

All alkali metals ( belongs to group 1 of periodic table) have 1 valence electron.

• Valence electron are those electron that are present in the outermost orbit of the atom.
• Alkali metal present in group 1 of periodic table: Hydrogen ($\mathrm{H}$), Lithium ($\mathrm{Li}$), Sodium ($\mathrm{Na}$), Potassium ($\mathrm{K}$), Rubidium ($\mathrm{Rb}$), Cesium ($\mathrm{Cs}$),and Francium ($\mathrm{Fr}$).
• The alkali metals or group 1A family have only one electron in their valence shell.
• Example: Sodium(Na) has 11 electron 2 are in the first filled shell, 8 are in second filled shell. This makes a total of 10 in filled shells leaving only one electron in the outer shell, where the valence electrons are located. 1s²2s²2p⁶3s¹ is the electronic configuration of sodium.
• All the alkali metals follow the same pattern.
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