5.2

Question 1

one of the elements of group 1 of the periodic table (lithium,sodium,potassium,rubidium,cesium,and francium)

Answer 1

alkali metal

Question 2

one of the elements of group 2 of the periodic table (beryllium,magnesium,calcium,calcium,strontium,barium,and radium)

Answer 2

alkaline-earth metal

Question 3

one of the elements of group 17 of the periodic table (fluorine, chlorine, bromine, iodine, and astatine); halogens combine with most metals to form salts

Answer 3

halogen

Question 4

one of the elements of group 18 of the periodic table (helium, neon, argon, krypton, xenon, and radon); noble gases are unreactive

Answer 4

noble gas