An x-ray tube emits x-rays with a wavelength of 1.00 x 10-11 m. calculate the photon energy, in joules, that the emitted x-rays possess. e = x 10 joules

the answer is a hope this

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.

i don't know that i agree with that but what's the question ?