Science / Periodic Table of Elements / Alkali Metal: The Group 1 elements, lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr) react with cold water for form strongly alkaline hydroxide solutions, and are referred to as 'alkali metals'. Hydrogen is not considered an alkali metal, despite its position on some periodic tables.
Science / Chemistry / Alkaline Earth Metal: (alkali metal) The Group 2 elements, beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra) form alkaline oxides and hydroxides and are called 'alkaline earth metal MORE
Entertainment / Music / Metallophone: Percussion instrument consisting of tuned metal bars, usually struck with a mallet. MORE