Science Chapter K5

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 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 law

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 potassium, rubidium cesium and francium)

Question 6

alkali earth metals

Answer 6

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

Question 7

halogen

Answer 7

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

Question 8

noble gasses

Answer 8

one of the elements of group 18 on the periodic law (helium, argon, neon, krypton, xenon, and radon) noble gases are unattractive.