Which element has a stronger Zeff (effective nuclear change) Na or Rn and why?

chlorine

Explanation:

Because chlorine is in the same period as phosphorus and sodium, but has the most protons in its shell (the most right within the same period) it has the greatest effective nuclear charge.

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

clouds form

solid ice forms on leaves.

water droplets form on grass.