Chapter 7 - Eff Nuclear charge, size of atoms and ions

What is effective nuclear charge?

the net positive charge experienced by an electron in a multi-electron atom

How do you find effective nuclear charge

Zeff = # of protons - # of core electrons

How does effective nuclear charge change across the periodic table

Effective Nuclear Charge increases from left to right across the periodic table.

It decreases down a group

How does the size (atomic radius) of an atom change across the periodic table?

It decreases from left to right

It Increases from top to bottom

Where are the largest atoms found in terms of radius? Smallest?

Largest - Bottom left

Smallest - Top right

What does ionic size depend on (size of an ion)

The nuclear charge, number of electrons, and orbitals that the electrons are on

How do cations compare to parent ions in terms of radius

cations are smaller, as electrons are removed

How do anions compare to parent ions in terms of radius

Anions are larger, as electrons are added

What is an isoelectronic series

a group of ions all containing the same number of electrons