Chapter 5

Question 1

Periodic

Answer 1

describes something that occurs or repeats at regular intervals

Question 2

Periodic Law

Answer 2

the law that states that the repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements

Question 3

Period

Answer 3

in chemistry, a horizontal row of elements in the periodic table

Question 4

Group

Answer 4

a vertical column of elements in the periodic table; elements in a group share chemical properties

Question 5

Alkali Metals

Answer 5

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

Question 6

Alkaline-Earth Metals

Answer 6

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

Question 7

Halogen

Answer 7

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

Question 8

Noble Gas

Answer 8

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