Alkali metals are extremely reactive because they
1. have very small atomic masses
2. are not solid at room temperature
3. have one valence electron that is easily removed to form a positive ion
4. have two valence electrons that form compounds with calcium and magnesium

Respuesta :

Answer:

1 is the answer of these questions

Answer:

i think it is (3

Explanation:

They tend to donate their electrons in reactions and have an oxidation state of +1.