Lithium has 3 protons and is in Group 1 of the periodic table, making it an alkali metal. To find an element with similar properties, we would look for an element in the same group, which would typically have one electron in its outer shell.
Among the provided options, the one that would exhibit similar chemical properties to lithium would be:
An element with 11 protons, 11 neutrons, and 11 electrons.
This corresponds to sodium (Na), which has 11 protons and is also an alkali metal, sharing similar chemical properties with lithium. The other options do not align with lithium's position in the periodic table.