Which group of metals includes elements with one valence electron?
1. transition metals
2. alkaline earth metals
3. rare earth metals
4. alkali metals
4. alkali metals
The group of metals that includes elements with one valence electron is option 4: alkali metals.
The group of metals that includes elements with one valence electron is the group 4. alkali metals.
To find this answer, you would need to refer to the periodic table of elements. Each element in the periodic table is organized into periods (rows) and groups (columns). The group number indicates the number of valence electrons an element has.
In this case, the alkali metals are located in the first group (group 1) of the periodic table. They include elements such as lithium (Li), sodium (Na), potassium (K), and so on. These elements have one valence electron, which means they have one electron in their outermost shell.