You're expressing those two reactants as ions. The chemical equation for the reaction between barium and nitrogen is: 3Ba + N2 --> Ba3N2. Or, if you like, the net ionic equation for the formation of the insoluble precipitate barium nitride is: 3Ba+2 + 2N-3 --> Ba3N2.
This is not an equation but the chemical symbol of the cation: Ba2+.
NH4+ and Cl- don't react, Only SO42- and Ba2+ do so by forming precipitate: SO42- + Ba2+ --> (BaSO4)s
Ba2(SO4)2
The chemical formula for a nitride ion is N-3.
Ba2+ + [2Cl- + 2Na+] + SO42---> BaSO4 + [2Cl- + 2Na+]Ba2++ SO42- --> BaSO4
This is not an equation but the chemical symbol of the cation: Ba2+.
NH4+ and Cl- don't react, Only SO42- and Ba2+ do so by forming precipitate: SO42- + Ba2+ --> (BaSO4)s
Ba2(SO4)2
Formula: N3-
Ba2+
If: n3 = 8 Then: n = 2
Azide, N3- ( a linear ion isoelectronic with CO2), or conceivably nitride N3- a monoatomic ion
The chemical formula for a nitride ion is N-3.
The chemical equation is:Ba+ + 2 Cl- + 2 Na+ + SO4- = BaSO4(s) + 2 Cl- + 2 Na+
Ba2+ + [2Cl- + 2Na+] + SO42---> BaSO4 + [2Cl- + 2Na+]Ba2++ SO42- --> BaSO4
Formula: N3-
SO42- + Ba2+ --> BaSO4