Science

Running head : SCIENCE[Name][Course][Professor][University]Chemical change is the change in center fields that produces early(a) substance of different chemic and physical properties . It is characterized by the performance of chemic reaction . An example of chemical substance change is the importunate of pelf or paper . In this process , the wile and chemical composition of the material changed . Moreover , the process cannot be reversed . A burned paper cannot be make keister to its original state , so as the sugar . For nigh materials , the only way of br reversing the change , if practicable , is by chemical federal agency onlyThe hold fast between atoms is called chemical hamper (Capri , 2003 . In general , there are the Tempter types of chemical bonds namely the bonce and the covalent . In loft bond , the som e negatrons of an atom are transferred to the atoms it will bond . However , for covalent bonds , the atoms share some of the electrons .

The electrons that interact in the bonding are the valency electrons . These are the electrons on the outer(prenominal) shell of the atom . A way to determine the humankind figure of valence electron of an atom is by written material its electron build . 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 puddle 8 electrons in total . However , for some atoms or elements that have d subshells , the valence electrons can also ! include the...If you postulate to shit a full essay, order it on our website: OrderEssay.net

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