Chemistry- Effective Nuclear Charge

PA #2

what is effective nuclear charge

How strongly electrons are attracted to the nucleus of the atom

what are valence electrons attracted to?

The nucleus

What do inner electrons repel?

Valence elctrons

What is shielding effect from?

Charges

Do inner electrons make a more or less powerful shielding effect

more powerful shielding effect

More valence electrons = a smaller or bigger atom

Why?

Smaller atom bc more VE to overcome shielding

Calculating Zeff

Zeff= Z - S

What does Z stand for in:

Zeff= Z - S

Protons

What does S stand for in:

Zeff= Z - S

Inner electrons

Inner electrons/ S equation

Total electrons - Valence Electrons

What does higher Zeff mean?

the electrons are more attracted which reduces the atomic radius/ size

Is Zeff always the same as the VE

Yes

Higher Zeff=

smaller atom

Lower Zeff =

Larger atom

Ex find Zeff of chlorine

17-10 = 7 zeff