Question
Describe the formation of oxygen molecule $\left(\mathrm{O}_2\right)$.
✓
Answer
(1) The atomic number of oxygen is 8. The electronic configuration of oxygen is (2, 6). Oxygen has 6 electrons in the outermost shell.
(2) It requires 2 electrons to complete the L shell and attain the configuration of neon (Ne).
(3) Each oxygen atom shares its valence electron with the valence electron of another oxygen atom to give two shared pairs of electrons which results in the formation of oxygen molecule.
(4) Thus, two electron pairs are shared between two oxygen atoms, forming double covalent bond (=).
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Light travels with a velocity $1.5 \times 10^8 m / s$ in a medium. On entering second medium its velocity becomes $0.75 \times 10^8 m / s$. What is the refractive index of the second medium with respect to the first medium? (Practice Activity Sheet -3 )
→Describe Hall’s process for concentration of bauxite.
Observe the given figure and name the following rays:
(i) ray AB
(ii) Ray BC
(iii) ray CD
Draw a neat labelled diagram of the arrangement of the equipment used in (1) Wilfley table method (2) Hydraulic separation method.
Derive the expression for the heat produced due to a current ‘I’ flowing for a time interval ‘t’ through a resistor ‘R’ having a potential difference ‘V’ across its ends. With which name is this relation known?
The speed of light in water and glass is $2.2 \times 10^8 m / s$ and $2 \times 10^8 m / s$ respectively. What is the refractive index of (i) water with respect to glass (ii) glass with respect to water?
→ Give the reasons for increase in human disasters after the World War-II.
What is ozone? How is it formed?
What is meant by valency?
What is the role of microbes in compost production?