ELECTRON CONFIGURATIONS AND THE PERIODIC TABLE

5.2

Groups of the Periodic Table Groups – share similar properties

Periods – similar e- configs Group 1 – Alkali Metals – ns1

Most reactive metals Silvery soft metal Must be stored under oil or kerosene b/c so reactive with water

Groups of the Periodic Table

Group 2 – Alkaline-Earth Metals – ns2

Harder, denser and stronger than gr. 1

Less reactive than gr. 1 Higher melting points than gr. 1

Hydrogen – group of it’s own Properties are not like gr. 1

Groups of the Periodic Table

Transition Elements – d block elements

Irregularities in some e-configs Good conductors of electricity High luster, less reactive than

gr. 1 & 2

Main Group Elements MGE – s and p blocks For p block, properties differ

greatly – some metals, metalloids, and some nonmetals

Group 17 – Halogens-ns2 and np5

Most reactive nonmetal React with Gr. 1 & 2 to form salts

F block

Lanthanides – Ce to Lu Reactivity similar to Gr. 2

Actinides – Th to Lr All radioactive

Review

Please complete the section review on page 149 and do numbers 1-6 for homework