An element has an atomic number of 30. How many protons and electrons are in a neutral atom of the element?
There are 30 protons and 30 electrons.
The atomic number gives the number of positively charged protons in an atom or element.
The number of protons is always equal to the number of electrons in a neutral atom.
The positive charge on the proton is canceled by the negative charge on the electron leaving a neutral atom.