Which response includes all of the following that are combination reactions, and none that are not combination reactions? LiO2 + CO2 → Li2CO3 Cl2 +2NaBr→Br2 +2NaCl HNO3 + KOH → KNO3 + H2O SO3 + H2O → H2SO4 1. Z1, Z2 and Z4 only
2. Z1 and Z4 only
3. Z1, Z3 and Z4 only
4. Z1 and Z2 only
5. Another reaction or another combination

did anyone actually do this? like if anyone has submitted this i rly need .

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.  

i wish i could but this one is weird give me abc and i can solve it.