Acertain atom has 22 protons and 19 electrons. this atom loses an electron. the net charge on the atom is now?

Explanation:

It is known for a neutral atom number of protons equal the number of electrons. But since, it is given that there are 19 electrons so it means that the atom already has +3 charge.

Also, number of protons of an atom represent its atomic number. And when an atom loses an electron then it acquires a positive charge. When an atom gains an electron then it acquires a negative charge.

Here, because the atom loses an electron therefore, the net charge on the atom is now +4.