P power 2-
Is it atom or ion
The number of protons and electrons
The number of protons and electrons in an atom are the same.
To determine whether P power 2- is an atom or an ion, we need to look at its charge. The superscript -2 indicates that the particle has a -2 charge.
An ion is an atom or a molecule that has gained or lost electrons, resulting in a non-zero charge. In this case, the -2 charge suggests that P power 2- is an ion.
To find the number of protons and electrons, we need to know the atomic number of P. The atomic number of phosphorus (P) is 15, which indicates that it has 15 protons.
Since P power 2- has a -2 charge, it means it has gained two extra electrons. Therefore, it will have 15 protons and 17 electrons.