In my opinion, Chemistry is one of the more challenging subjects, for there are many things for us to memorise, including the periodic table, atomic mass and number of each element, the different types of bonding, and what will happen when acids and bases react with other compounds.
However, as the first post of my blog, I will be talking about Ionic bonding.
Ionic bonding is a type of chemical bond, usually between a metal and a non-metal. Ionic bonding occurs when metals loses electrons and "gives" them to the non-metals, causing the metals to have a positive charge while the non-metals have a negative charge. This results in both atoms to form a new compound and both atoms to have full valence electrons. Valence electrons are the number of electrons in the outer most shell of the atom.
For example, Sodium and Chloride. Sodium is a metal with 1 valence electron while Chloride is a non-metal with 7 valence electrons. When they are heated, Sodium will then react with Chloride to from a new compound, Sodium Chloride (Table Salt). The Sodium ion will have 8 valence electrons and the Chloride ion will also have 8 valence electrons.
Ionic bonding can be represented in the form of a dot and cross diagram. Dots are used to show the electrons of the first element while crosses are used to show the electrons of the second element. Only the valence electrons for both ions in the compound are drawn.
Compounds that are bonded by ionic bonding, also known as ionic compounds, have different properties that covalent compounds, that are bonded by covalent bonding. Ionic compounds are solid in room temperature, conducts electricity in their liquid or aqueous state and have high melting and boiling points.
No comments:
Post a Comment