β why
Why do alkali metals get more reactive down the group?
ChemistryPeriodic table
Quick Answer
They become more reactive because the outer electron is farther from the nucleus and easier to remove. As you go down Group 1, atoms are larger and hold that electron less tightly.
The Full Story
In Group 1, each element has one valence electron. Going from lithium to sodium to potassium and beyond, the outer electron is in a higher energy level, farther from the nucleus and shielded by inner electrons. That makes ionization easier, so the atom loses its electron more readily in reactions. The result is increasing reactivity down the group, which is why potassium is more reactive than sodium, and cesium is extremely reactive.
Key Facts
1.Group 1 elements have one valence electron
2.Atomic size increases down the group
3.Potassium is more reactive than sodium
YouTube Angle
Suggested video title for this topic:
"Why do periodic table elements get more explosive as you go down?"