3during a flame test, a lithium salt produces a characteristic red flame. this red color is produced when electrons in excited lithium atoms
(1) are lost by the atoms
(2) are gained by the atoms
(3) return to lower energy states within the atoms
(4) move to higher energy states within the atoms

The correct answer is (3).  Return to lower energy states within the atoms

Explanation:

When an atom absorbed a specific energy, the electron move from lower energy state to higher energy state known as excited energy state. After sometime, the excited state electron come back to lower energy orbital (Ground state) with emission of light as in this case of lithium, red light is emitted.

We can’t you if you only tell us that you have to show us what the answers are

Ch4 and ph3 are both covalent since they are composed both of non-metals.    ch4 is non- polar because of  london forces and has a geometry of tetrahedral  ph3 , on the other hand, is umbrella shaped polar and has dipole-dipole intermolecular force (imf) . since ph3 is polar, it has a stronger imf