<span>lithium and fluoride ions are arranged in an alternating three-dimensional crystal lattice. It's not possible to really isolate a single Li-F pair in the solid state. The many positive-negative electrical attractions hold the solid together. Ionic compounds are usually solids at room temperature since these electrical attractions are quite strong.</span>
Answer:(3)
Explanation: 2Al+3H2SO4----->Al(2SO4)3+3H2
Hydrogen as it has only 1 proton and therefore only an atomic mass of 1...