If element X has 85 protons, how many electrons does it have?
electrons
The element Astatine has 85 protons, as well as 85 electrons.
Also:
The number of protons is equal to the atomic number (the big number by the atom on a periodic table)
The number of electrons is equal to the number of protons
The number of neutrons is equal to the atomic mass minus the atomic number
The number of electrons in an atom is equal to the number of protons. Therefore, element X with 85 protons will also have 85 electrons.
To find the number of electrons an element has, you need to look at its atomic number. The atomic number represents the number of protons an element has. In this case, element X has 85 protons.
The number of electrons in a neutral atom is equal to the number of protons. Therefore, element X with 85 protons would also have 85 electrons.