Periodic Table Flashcards
What is electronegativity?
The tendency for an atom to attract a bonding pair of electrons
Electronegativity is measured within
Bonds
Which characteristic has a direct effect on each of the periodic trends?
Effective nuclear charge
The greater the effective nuclear charge the
Greater the electronegativity
Effective nuclear charge depends on
- Number of protons
- Distance from nucleus
- Shielding by inner shell electrons
Zeff can be increased by the
Number of protons
Zeff can be decreased by the
- Distance
- Amount of shielding
Zeff does not measure the repulsion experienced by
Electrons in the same valence shell
Alkali metals have distinctive flame colors due to their
Easily excited electrons in the s shell
Alkali earth metals react with water to form
H2 gas and alkaline hydroxides
What do metal oxides become in water?
Hydroxides
The transition metals have little variability in their ionization energies and electronegativities due to their
Similar valence shells
Transition metals are characterized by the formation of many
Paramagnetic compounds
Transition metals have incompletely filled
D orbitals
Transition metals are characterized by oxidation states due to the
Low reactivity of unpaired d electrons