Activity 4. Fill me Up! Directions: Fill in the blanks with missing word/s. Elements within the modern periodic tablc are organized in the simplest way so that information about the clements and their compounds are casily revealed. The vertical columns of the periodic table are called 1. It identifies the 2. of elements. The horizontal rows of the periodic table, called 3 are numbered from top to bottom There are 18 groups in the Periodic Table of Elements. Group 1 is named as Alkali Metals, Groups 2 as 4 and Group 16 as 5. Groups 3-12 are called as 6 The lanthanides and actinides are special series of elements but are also part of the transition block. They are also called as inner transition clements. Groups 1, 2, 13-18 are called as representative elements. There are three classifications of clements, namely: metals, 7 and metalloids. The majority of the elements on the left side of the periodic table are 8. The nonmetals are confined to the right side of the table 9. show both properties of metals and nonmctals. The physical properties of metals include luster, and 10.​