Review of Periodic Table

Question 1

Down a Group

Answer 1

spatial extension increase
more orbital overlap k
increased nodes

Question 2

Across a Period

Answer 2

spatial extension decreases
Zeff increases
3d core-like
less nodes

Question 3

2nd Period

Answer 3

Zeff increases
spatial extension decreases
increased ionisation energies
decreased bond lengths

Question 4

4th Period

Answer 4

similar sizes and ionisation energies
core-like nature of 3d orbitals
shield 4s electrons

Question 5

Fluoride Compounds

Answer 5

across
ionic - polymeric - covalent
oxidation states low - high - low
consistent with increased Zeff

Question 6

Bond Strengths

Answer 6

decrease down a group
smaller overlap
transition. teals opposite effect due to core-like nature of 3d orbitals

Question 7

Interelectron Repulsions

Answer 7

down a group - repulsions decrease

across a period - repulsions increase along with oxidation state

Question 8

Hydration Enthalpies

Answer 8

across a period enthalpies increase

increased Zeff