Once again, I am back with now, what I have learnt during Term 2. So for Term 2, we had learnt about Chemical Bonding, Acids and Alkaline and lastly, Sexual Reproduction.
Here let me explain to you guys what is Chemical Bonding.
As you have read one of my previous posts, where I introduced chemical elements to you all, Chemical Bonding will therefore, mean bonding of difference chemical elements. So how do these chemical elements bond? There are 2 main types of chemical bonding, namely ionic and covalent bonding. Now let me further explain to you guys, what really are them
Periodic Table
Once again back with the periodic table, I shall now break the periodic table into 2 main parts, the metal elements and non-metallic elements.
As seen from the above periodic table, the BLUE part is the metal elements and the PINK part is the non-metal elements. The GREEN part is also known as the metalloids which are neutral. Therefore, we can conclude that the majority of the elements are metals. Since we have known this, I shall move on to the next part, the bondings.
Noble gas
Noble gas are chemical elements that has low chemical reactivity. They are normally chemical elements that have electrons that fills up the whole circle. An example will be lithium with 10 electrons, filling up the first and second circle.
Ionic Bonding
Ionic Bonding is formed through metal elements and non-metal elements. For example, lets take sodium chloride (NaCl) which is our table salt as an example. Sodium is a metal while chlorine is a non-metal. Sodium have a total of 11 electrons and 11 protons while chlorine have 17 electrons and 17 protons. In ionic bonding, the 2 elements will "give" their electrons therefore, Sodium will become 1+ and Chlorine will become 1-. This is so as when sodium gives chlorine 1 electron, it will become positively charged by 1 while chlorine on the other hand when received the electron, will become negatively charged by 1. Therefore, these elements will allow each other to become noble gases.
Covalent Bonding
Covalent Bonding is formed through 2 non-metal elements. For example lets take water also known as H2O as an example. Hydrogen is a non-metal and Oxygen is also a non-metal. Hydrogen has 1 electron and 1 proton while oxygen had 8 electrons. And in covalent bonding, the 2 elements that are present will "share" their electrons. Therefore, in order for the elements to become a noble gas, 2 Hydrogen will be needed to merge with oxygen to form H2O. During this process, neither party loses nor gain electrons, therefore, no elements will become negatively or positively charged.
Equation Writing
After we have known what is chemical bonding, we also have to know how to write a balanced chemical equation. Using H2O again as an example, H2 + O = H2O. This is an example of a balanced equation. But if I multiply the number of H2 by 2, and write it 2H2 + O = H2O, the equation will not be balanced as 2 hydrogen molecules will be lost. Therefore, I will have to write it as 2H2 + O2 = 2H2O. This will form another balanced equation again.
With this, I end what we have learnt for chemical bonding and equation writing in Term 2.
Here is a short summary on Chemical Bonding and Equation Writing.
Chemical Bonding is split into 2 different types of bondings namely, ionic and covalent bonding, and ionic bonding is between a non-metal chemical element and covalent bonding is between 2 metal elements. And to form a noble gas, a balanced chemical equation will be needed.
Reflection:
I feel that this topic is rather boring yet confusing at times. This is so as when you bond chemicals, you have to fully understand the periodic table and know it well enough before you can know how many atoms of that chemical is needed to form a noble gas. However, it gets boring after a period of time as when you have fully know the bonding process and the periodic table itself, it will become very easy. Therefore, I feel that this topic is rather challenging at times yet, gets boring after a long period of time of getting exposed to chemical bonding.
Thanks,
Aloysius Chan
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