Question

Please help me.. Answer only the 3 one ​

Answer 1

Answer:

calcium carbonate is the compound for caco3

Answer 2

3rd=Calcium carbonate

2nd=

Basis for Dalton's theory

The law of conservation of mass says that matter is not created or destroyed in a closed system. That means if we have a chemical reaction, the amount of each element must be the same in the starting materials and the products

1st=

cation is a positively charged ion, with fewer electrons than protons, while an anion is negatively charged, with more electrons than protons. Because of their opposite electric charges, cations and anions attract each other and readily form ionic compounds