The atomic number of oxygen is 8. a How many electrons are needed to complete octet in Oxygen atom. 3
Answers
Answer:
2 electrons are needed to complete octet rule in Oxugen.
Hope it helps....
Answer:
8 protons, 10 electrons
Explanation:
According to lewis rule, every atom tries to achieve the electronic configuration of the noble gases. This can be done either by losing or gaining electrons which forms ionic bonding between the atoms or by sharing of electrons which forms covalent bonding.
-When an atom combines with another atom as a result of ionic bonding, the two different species formed which have their octet complete are called the ions. Among them, one ion has an excess of electrons which is called anion and one ion has deficiency of electrons which is called cation.
-Cation is formed when an atom loses its electrons to attain the noble gas electronic configuration in order to become stable. Anion is formed when an atom gains electrons to attain the noble gas electronic configuration in order to become stable.
-Oxygen atom has the atomic number 8. Atomic number gives the information about the number of protons as well as the number of electrons. So we can say that
Atomic number = no. of electrons = no. of protons
-So we see that there are 8 electrons and 8 protons in an oxygen atom. We know that every atom always tries to complete its octet by gaining or losing electrons in order to become stable. Oxygen atom belongs to group 16. So it has 6 valence electrons in its outermost shell. Thus, it is easier to gain 2 electrons to complete its octet rather than lose 6 electrons.
-Oxygen atoms already had 8 electrons. If 2 more electrons are added to complete the octet of the ion, the total number of electrons becomes 8+2=10. No change occurs in the number of protons because the protons are located in the nucleus of the atom. So they remain in the nucleus itself and the oxygen ion will also have 8 protons only.