Predict the ion formed by each element.
Here, we are going to identify the ion formed by each of the given elements.
Ions are formed by the loss or gain of electrons. An ion is a charged particle and can be negatively or positively charged. A negatively charged ion is called an ‘anion’ and is formed by gain of electrons and the positively charged ion is called a ‘cation’ and is formed by the loss of electrons.
The number of charges in the ion indicate the number of electrons lost or gained.
For example, Na+ has one positive charge. Here, the positive charge indicates loss of electron and the number of charge (1) indicates loss of one electron.
The type of ion formed by an atom depends on the electronic configuration(distribution of electrons in the various shells) of the atom. Atoms always try to gain 8 electrons in their outermost shell(Octet rule) and attains nearest noble gas configuration. So, in order to complete this octet, they gain or lose electrons and form ions.