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