EVERYDAY SCIENCE

Detailed explanation-1: -Atoms that gain extra electrons become negatively charged. A neutral chlorine atom, for example, contains 17 protons and 17 electrons. By adding one more electron we get a negatively charged Cl-ion with a net charge of-1.

Detailed explanation-2: -If an atom or molecule gains an electron, it becomes negatively charged (an anion), and if it loses an electron, it becomes positively charged (a cation).

Detailed explanation-3: -Potassium is a group 1 element, so it will form an ion with +1 charge. As potassium after loosing 1 electron, it gains noble gas electronic configuration which is very stable, hence this has stable +1 valency. Was this answer helpful?

Detailed explanation-4: -For example, all ions made from alkali metals, the first column on the periodic table, have a 1+ charge. Ions made from alkaline earth metals, the second group on the periodic table, have a 2+ charge. On the other side of the periodic table, the next-to-last column, the halogens, form ions having a 1− charge.