Science

Running head : SCIENCE[Name][Course][Professor][University]Chemical change is the change in perfumes that produces other(a) substance of different chemic and physical properties . It is characterized by the litigate of chemical reaction . An example of chemical change is the sunburn of gip or paper . In this process , the people of illusion and chemical composition of the material changed . Moreover , the process cannot be reversed . A burned paper cannot be brighten back to its original state , so as the booty . For some materials , the only way of br reversing the change , if possible , is by chemical means onlyThe alliance between atoms is called chemical perplex (Capri , 2003 . In general , there are hellion types of chemical bonds namely the loft and the covalent . In ionic bond , the some negatrons of an at om are transferred to the atoms it will bond . However , for covalent bonds , the atoms share some of the negatrons .

The electrons that interact in the bonding are the valency electrons . These are the electrons on the outer(prenominal) lambast of the atom . A way to determine the material embody of valency electron of an atom is by writing its electron configuration . The electron configuration of H is 1s . This means that its valence electron is 1 . For O , the electron configuration is 1s2 2s2 2p6 . The valence electrons for this configuration lie on the 2s and 2p subshells , which have 8 electrons in total . However , for some atoms or elements that! have d subshells , the valence electrons can also include the...If you want to pull up a full essay, order it on our website: BestEssayCheap.com

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