Best Answer: Elements tend to be most similar to the elements that are above or below them (in the same vertical column) of the periodic table, as those elements will have the same number of valance electrons. So, lithium would have properties similar to sodium. read more
Lithium and Beryllium are both metals and therefore would have similar properties to any other metal. Lithium has the closest similar properties to Sodium, Potassium, Rubidium, Cesium and Francium. They all have one electron in there valence shell. read more
Oxygen is a gas, so other gases would have similiar physical properties. Other gases would include nitrogen (N) and fluorine (F). However, another element with a similar chemical property would be sulfur (S). read more