Describe the trends in electron configuration in the periodic table by selecting the terms from the drop-down menus.

the number of valence electrons from the left to right across a period.
the number of valence electrons from the top to the bottom of a group.
electrons are added into the outermost in groups 1 and 2.
electrons are added in the outermost in groups 3 through 12.
electrons are added in the outermost in groups 13 through 18.

Match the vocabulary terms to their definitions. 1 . a long, chain-like set of molecules made up of repeating units joined end to end polymer 2 . a hard, brittle, heat- and corrosion-resistant material made by subjecting a nonmetallic mineral mixture to intense heat ceramic 3 . a plastic with low elongations that cannot be recycled thermoset 4 . a carbon fiber embedded in a polymer resin matrix thermoplastic 5 . a plastic with high elongations that can be recycled crystal 6 . a solid form resulting from the arrangement of atoms, ions, or molecules in definite geometric patterns composite