Answer:
3&4 i belive if im wrong sorry im not very good at this i just know basic physics (im not sure if thats physics tho)
Explanation:
This question is hard but I found the answer from merit nation
The ionic compounds on dissolving in aqueous solution dissociate into their respective ions that are cations and anions.
The ions present in the aqueous solution of are and .
So, the chemical formula of the cation present in the aqueous solution of is .
Berryllium
its the most reactive (mark brainliest plz)
8. B
9. D
10. A
give brainliest pls ^-^