Q. Consider the following:- Lithium
- Magnesium
- Potassium
- Rubidium
Which of the above are classified as alkali metals?
Answer:
1, 3 and 4
Notes: Lithium, potassium, and rubidium are alkali metals found in group 1 of the periodic table, characterized by having one electron in their outermost shell. Magnesium, however, is an alkaline earth metal from group 2, not an alkali metal. Thus, only statements 1, 3, and 4 are correct.