Question

Which one is more reactive other than two among three elements having atomic numbers 16, 18, and 19 respectively

Answer 1

Here's You're Answer

1. Z=16 ,,=Sulphur
2.Z=18,,=Argon
3.Z=19,,=Potassium

As we Know
*Argon is Noble Gas And Doesn't much reactive
*According to Reactivity Series Potassium is highly Reactive..

Then Answer is Atomic No.19