Hno3 +s → h2so4 + no
you now have these half-reaction equations:
3e" + hno3 → no
sh2so4 + be
what is the next step?
add the two half-reactions together.
multiply each equation by a factor to give the same number of electrons in both
balance the atoms on each side.
done
intro
a

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.  

2b2t

explanation:

2b2t