Lead will always have 82 protons. If it has a 2+ charge, that means there are 2 more protons than electrons, so there are 80 electrons.
The atomic number of hafnium is 72. So there is 72 protons.
In Li plus 1, the element is lithium (Li) which has 3 protons. Since it has a +1 charge, it means it has lost one electron, so it has 2 electrons.
Cu2+ has 29 electrons (since copper has 29 protons) and 27 protons, after losing 2 electrons to become a positively charged ion.
Fe 2+ (Iron) has... 26 protons 24 electrons 30 neutrons
The number of protons is 2.
The number of protons is 2.
It has 4 d electrons.
The ion carbon C4+ has 6 protons and 2 electrons.
Lead will always have 82 protons. If it has a 2+ charge, that means there are 2 more protons than electrons, so there are 80 electrons.
Magnesium has 12 protons. Bear in mind that ionization has no effect on the number of protons, so the "2 plus" is unnecessary. Magnesium always has 12 protons, that is the definition of magnesium.
The atomic number of hafnium is 72. So there is 72 protons.
Cr3br
In Li plus 1, the element is lithium (Li) which has 3 protons. Since it has a +1 charge, it means it has lost one electron, so it has 2 electrons.
The ion Mg(2+) has 12 protons, 10 electrons and 12, 13 0r 14 neutrons depending on the isotope.
2 protons and 2 neutrons. An alpha particle is the same as a helium nucleus.
2 protons and 2 neutron