## Chemistry 9th Edition

For names of the elements, refer to the periodic table. $\Longrightarrow$The 38 elements in groups 3 through 12 of the periodic table are called "transition metals." $\Longrightarrow$Any of the elements beryllium, magnesium, calcium, strontium, barium, and radium, occupying Group IIA (2) of the periodic table are called Alkaline earth metals. $\Longrightarrow$The Alkali metals are a group 1 (Except Hydrogen) in the periodic table consisting of the chemical elements lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). $\Longrightarrow$Any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying Group 18 of the periodic table are called noble gases. $\Longrightarrow$Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table are called halogens. $\Longrightarrow$Any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table (atomic numbers 57–71). $\Longrightarrow$Any of the series of fifteen metallic elements from actinium (atomic number 89) to lawrencium (atomic number 103) in the periodic table.