54
10 electrons.
Ti2- would be the symbol for an ion with 22 protons and 24 electrons. This would be EXTREMELY unlikely to exist though. Ti2+ is more usual with 22 protons and 20 electrons. Ti4+ is even more stable with 22 protons and 18 electrons.
The symbol of an ion is determined by the number of protons and electrons. With 50 protons and 48 electrons, this ion has a +2 charge (50 protons - 48 electrons = +2 charge). Therefore, the symbol would be written as Sn2+.
Technically, any atom could have 40 electrons, but it would have a very weird charge. However, Zirconium has 40 electrons without being an ion.
The correct answer would be ground state
Electrons are found outside the nucleus of the atom and they have negative charge.
Pb with 4 dots around it to represent its 4 valence electrons.
Look at the periodic table. You see that the element that has 16 protons is Sulfur. Electrons have a single negative charge, while protons have a single positive charge, so an ion with 2 more electrons than protons will have a charge of 2-. So, the symbol of the ion would be S2- .
When selenium gains two electrons, it becomes the selenide ion.
A fluorine ion with atomic number 9 and 10 electrons has a charge of -1 because it has one extra electron as compared to the number of protons (10-9 = 1). Its symbol is F-.
6
The are none.