Question

1.The repeating pattern of the properties of elements from row to row in the periodic table is an example of ___________

2. An element that appears in Group 18 of the periodic table is called a(n) __________

Answer 1

1. Periodicity (the repetition of several properties in a row on the Periodic Table)

2. Noble Gas (Noble gases are located in group 18 on the Periodic Table)