Answer:
1.Chlorine gains an electron, leaving it with 17 protons and 18 electrons. Since it has 1 more electron than protons, chlorine has a charge of −1, making it a negative ion. When ions form, atoms gain or lose electrons until their outer energy level is full.
2.The number of electrons lost, and so the charge of the ion, is indicated after the chemical symbol, e.g. silver (Ag) loses one electron to become Ag+, whilst zinc (Zn) loses two electrons to become Zn2+
3.Iron atoms loses two electrons and carries two positive charges and it is called ferrous ion and it is bivalent i.e., Fe+2.
4.The aluminum atom loses its three valence electrons. The Mg 2+ ion, the Al3+ ion, the Na + ion, and the Ne atom are all isoelectronic. For representative elements under typical conditions, three electrons is the maximum number that will be lost.
5.The atomic number for bromine is 35, which means it has 35 protons in its atomic nuclei. A neutral bromine atom would also have 35 electrons. In order for a bromine atom to become a 1− bromide ion, it would have to gain an additional electron. ... The extra valence electron gives it a negative charge
