Gcse Chemistry Covalent Bonding In An Oxygen Molecule What Is The An oxygen atom has 6 electrons in its outer shell. oxygen is in group 6 of the periodic table. two oxygen atoms will each share two electrons to form two covalent bonds and make an oxygen molecule (o 2). this is a picture of an oxygen molecule. by sharing the four electrons where the shells touch each oxygen atom can count 8 electrons in its. How many covalent bonds hold the water molecule together? a: the oxygen atom shares one pair of valence electrons with each hydrogen atom. each pair of shared electrons represents one covalent bond, so two covalent bonds hold the water molecule together. the diagram in the figure below shows an example of covalent bonds between two atoms of the.
Covalent Bonding In An Oxygen Molecule Oxygen and other atoms in group 6a (16) obtain an octet by forming two covalent bonds. fluorine and the other halogens in group 7a (17) have seven valence electrons and can obtain an octet by forming one covalent bond. typically, the atoms of group 4a form 4 covalent bonds; group 5a form 3 bonds; group 6a form 2 bonds; and group 7a form one bond. Placing one bonding pair of electrons between the o atom and each h atom gives h:o:h, with 4 electrons left over. each h atom has a full valence shell of 2 electrons. adding the remaining 4 electrons to the oxygen (as two lone pairs) gives the following structure: this is the lewis structure we drew earlier. The water molecule (h 2 o) is an example of compound with covalent bonds. the oxygen atom shares one electron with each of the two hydrogen atoms, forming two covalent bonds. octet rule and covalent bonding. the concept of covalent bonding ties in with the octet rule. Covalent bonds involve shared electron pairs between atoms. each atom contributes one electron to each shared pair, and effectively gains an additional electron from the shared pair. atoms share the same number of pairs needed to fill their valence shell, usually with eight. hydrogen only needs one additional electron to fill its valence shell.
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