Final answer:
The elements bordering the zigzag line in the periodic table are called semimetals or metalloids, characterized by properties between metals and non-metals.
Step-by-step explanation:
The elements that border the zigzag line in the periodic table are known as semimetals or metalloids. This zigzag line runs from boron to astatine and distinguishes metals, which are to the left of the line, from non-metals, which are to the right. The elements along this line exhibit properties that are intermediate between those of metals and non-metals. The periodic table also features vertical columns called groups (numbered 1-18), with elements within the same group sharing similar chemical properties. For instance, groups include the alkali metals in group 1 and the halogens in group 17. The horizontal rows are known as periods, and the periodic table is a vital tool for predicting the properties and chemical reactions of elements.
The elements that border the zigzag line in the periodic table are known as semimetals or metalloids. These elements exhibit properties intermediate between metals and nonmetals. They are located adjacent to the zigzag line, which runs from boron to astatine.