Chemistry 9th Edition

A. If you look at the periodic table, you can easily see that the majority of the elements are classified as metals (elements to the left of the zig-zag marking on most periodic tables). B. According to the periodic table, element 118 (Oganesson/OG) is located in group 18 and is therefore classified as a noble gas, which means it is also a nonmetal. C. While hydrogen may have some metallic properties, it has far more non-metallic properties such as being a diatomic gas at STP. D. A family of elements is also known as a group of elements, not a period. E. When an alkaline earth metal, A, reacts with a halogen, X, the formula of the covalent compound formed should be $AX_{2}$.