Hydrogen is different from the other elements in column 1 because it is the lightest and simplest atom, consisting only of one proton and one electron.
Hydrogen is different from the other elements in column 1 (Group 1) because it is the only element in that group that is not an alkali metal.
Hydrogen is different from the other elements in column 1, also known as Group 1 or the alkali metals, because it is not classified as a metal. While the other elements in this group, such as lithium (Li), sodium (Na), and potassium (K), are metals, hydrogen (H) is a nonmetal.
