Which of the alkali metals, with the atomic number 19 is missing from - Lithium, Sodium, Rubidium, Caesium and Francium?
which of the alkali metals, with the atomic number 19 is missing from - lithium, sodium, rubidium, caesium and francium
FreebaseQA-train-845.P0
alkali metals
alkali metal
m.0hvl
chemistry.chemical_series.elements
m.025s7j4
potassium