In an atom the number of electrons is equal to the number of protons.
That is, in the case of an un-ionized, non valence bonded molecule...
If the atom were ionized, it could have fewer or less electrons. If the atom were part of a valence bonded molecule, it could be sharing valence electrons with other atoms.
In a neutral atom the number of protons is equal to the number of electrons. And by definition the atomic number of an atom is equal to the number of protons in it. So the atomic number of a neutral atom is equal to the number of protons or the number of electrons in the atom.
The number of protons in an atom is equal to its atomic number.
The atomic number is equal to the number of protons [note correct spelling!] in each nucleus of an atom.
The number of protons is equal to atomic number; in a neutral atom the number of electrons is also equal to the numbers of protons.
The number of protons in an atom of an element is equal to the number of electrons in that atom which is equal to that element's atomic number.
A neutral atom has equal numbers of elecrons and protons.
To maintain the neutrality of an atom the number of neutrons must be equal to number of electrons; in ions this number is not equal.
In a neutral atom, the number of protons is always equal to the number of electrons.
Atomic number is always equal to the number of protons in an atom.
The protons and electrons are equal in number in a neutral atom
The number of protons in an atom is equal to its atomic number. In a neutral atom, the number of electrons is equal to that of protons. If the atom is negatively charged, add it to the number of electrons; and if positive, subtract.
Do you mean what does the number of protons equal? This is the atomic number of the element. All isotopes of an element will have the same number of protons, only the number of neutrons varies.