It's shiny and silver like a typical metal, but it is brittle and a poor conductor of electricity. This is the reason they possess some characteristics of metals and some characteristics of non-metals. The electronegativity and ionization energy values of metalloids lie in between those of metals and non-metals.
For this reason, these Frankenstein-type elements are also called semimetals or semiconductors. These elements have some properties that make them metal-like and other properties that make them non-metal-like. The elements with the distinguished honor of being called a metalloid are boron (B), silicon (Si), germanium (Ge), arsenic (As), antimony (Sb), tellurium (Te), and polonium (Po). Those elements are dubbed the metalloids. Of course there are those pesky elements residing on the zigzag that don't quite fit in either category. It divides the metals on the left half of the table from the non-metals on the right side of the table.
Think of it as the prime meridian of the periodic table. Have you ever wondered what that bold zigzag line is on the right side of the periodic table? Seems out of place. Instead, the p-block is split into metals, metalloids, and non-metals. In this section, dividing elements into columns is so 2000 and late.
Our next stop on this chemistry train 'o fun is the p-block. So far it's been pretty straightforward: explore a column here, learn about a column there, with elements of the same column sharing similar properties. It's hard to believe, but we've already navigated through a huge chunk of the periodic table. Metals, Metalloids, and Non-metals Metals, Metalloids, & Non-Metals, Oh My!
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