Effective Nuclear Charge

[Margaret Akey]

Can someone explain effective nuclear charge? Why does it go up as you go across the period?

[Rylee Nelsen 3A]

Effective nuclear charge increases across the period and decreases going down a group.

[Irene Zhou 1E]

The effective nuclear charge increases across the period because of an increase in positive nuclear charge with no accompanying increase in number of electron shells. The effective nuclear charge decreases down a group because the greater size causes a weaker net attraction.

[Hannah Yates 1K]

Effective Nuclear Charge increases when the number of protons increases, and the number of protons increases as you go across a table

[Ronak Singh]

Effective nuclear charge is the net positive charge experienced by an electron in an atom.

[Michelle Cervantes 1H]

Is this similar to or entirely different from ionization energy?