Question

When we will go down in a group in periodic table than electrons and number of shells will increase. and number of protons will also increase then nuclear charge of particular atom of element will increase or not?

Answer 1

• Decreases.
  
• The periodic table tendency for effective nuclear charge: Increase across a period (due to increasing nuclear charge with no accompanying increase in shielding effect). Decrease down a group (although nuclear charge increases down a group, shielding effect more than counters its effect).