Junior Cert Science - Covalent Bonding

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   attraction      bonding      chloride      covalent      eight      electrons      hydrogen      molecule      noble      nucleus      one      shares      two   
Not all atoms want to transfer when bonding. Non-metals share electrons when . This type of bond is called a bond. A covalent bond is the force of between two atoms as a result of their sharing a pair of electrons. A group of atoms held together by a covalent bond is called a . An example of a covalent bond is the hydrogen molecule. The hydrogen molecule consists of hydrogen atoms joined together. Both hydrogen atoms need an extra electron to achieve the configuration of the nearest gas, helium. Thus, each hydrogen atom its electron with the other hydrogen atom such that two electrons orbit around each . Both hydrogen atoms now have a share of two electrons making this arrangement more stable than individual hydrogen atoms. One shared pair of electrons is called a covalent bond. Another example of such a bond is the hydrogen chloride molecule. Hydrogen needs electron, and chlorine needs a single electron to achieve the nearest noble gas configuration of each As a result, hydrogen shares its only electron with chlorine to give chlorine a share of electrons. Chlorine also shares one of its electrons with hydrogen to give hydrogen a share of two electrons. Both atoms now have the electron configuration of the nearest noble gas, and the resulting molecule of chloride (HCl) is more stable than the individual hydrogen and chlorine atoms.