Question

give the symbol for an element that is 1) a halogen. 2) an alkali metal. 3) a noble gas. 4) an alkaline earth metal.

Explanation:

1. Halogens are in Group 17 of the periodic table. A common halogen is chlorine with symbol Cl.
2. Alkali metals are in Group 1. Sodium is a well - known alkali metal with symbol Na.
3. Noble gases are in Group 18. Helium is a noble gas with symbol He.
4. Alkaline earth metals are in Group 2. Calcium is an alkaline earth metal with symbol Ca.

Answer:

1. Cl
2. Na
3. He
4. Ca