Hep me pls 10 points pls

what do the symbols in parenthesis indicate?
cacl2(aq) + 2agno3(aq)) → ca(no3)2(aq) + 2agcl(s)

1 the catalyst used in the reaction

2 the number of atoms of each reactant and product

3 the physical state of each reactant and product

4 the number of units of each reactant and product

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

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