Why ions form

When something loses electrons we say that it has been oxidised. When something gains electrons, we say it has been reduced. So in ionic bonding, the metals are oxidised and the non-metals are reduced. Forming ions Ions are electrically charged particles formed when atoms lose or gain electrons.

Positively charged sodium and aluminium ions. Negatively charged oxide and chloride ions. Ions form when an atom gains or loses electrons in order to find a more stable configuration. Explanation: An ion is a positively or negatively charged atom. I hope this was helpful! Related questions How do I determine the molecular shape of a molecule?

What is the lewis structure for co2? What is the lewis structure for hcn? How is vsepr used to classify molecules? What are the units used for the ideal gas law? Iodine is in group 7. The charge is negative, since iodine is a non-metal. Forming ions An ion is an atom or group of atoms with a positive or negative charge. Ions form when atoms lose or gain electrons to obtain a full outer shell: metal atoms lose electrons to form positively charged ions non-metal atoms gain electrons to form negatively charged ions Forming positive ions Metal atoms lose electrons from their outer shell when they form ions: the ions are positive, because they have more protons than electrons the ions formed have full outer shells the ions have the electronic structure of a noble gas group 0 element , with a full outer shell For elements in groups 1, 2 and 3, the number of electrons lost is the same as the group number.

A sodium atom loses one electron to form a sodium ion Forming negative ions The outer shells of non-metal atoms gain electrons when they form ions: the ions formed are negative, because they have more electrons than protons the ions have the electronic structure of a noble gas group 0 element , with a full outer shell For elements in groups 6 and 7, the charge on the ion is equal to 8 minus group number.