Matching Pairs 8.5C_VocabMatchOnline version 8.5C Patterns of The PTE. by Andrea Soliz 1 Noble Gas 2 nonreactive 3 Metal 4 Periods 5 Group 1 and 17 6 Groups 7 Periodic Table of Elements 8 Non-metal 9 reactive The type of element that is characterized by being unreactive non-metals in group 18. The type of of element characterized by being dull, brittle, and poor conductors of heat and electricity. a term used to describe elements that do not have a complete valence shell. a term used to describe an element that has a full valence shell. The columns on the periodic table that show elements with the same number of valence elecrons The rows on the periodic table that show elements with the same number of energy levels These groups are known for being highly reactive The most common type of element characterized by being shiny, malleable, ductile, and good conductors The organization of elements into groups and periods based on their chemical properties.