What are the names of these iconic compounds LiCi BaO Na3N and PbSO4?

The compounds you mentioned are lithium chloride (LiCl), barium oxide (BaO), sodium nitride (Na3N), and lead(II) sulfate (PbSO4). Each of these compounds features distinct elements and properties, with lithium chloride being a common salt, barium oxide known for its use in ceramics, sodium nitride as a rarely encountered nitride, and lead(II) sulfate often used in batteries and as a pigment.