Question

Write electron dot structure of calcium and sulphur.

Answer 1

Electron dot structure

• Electron dot structure is also known as Lewis structure, Lewis dot structure, Lewis dot formula, or Lewis electron-dot formula.
• It is a way of representing atoms, ions, or molecules by showing the outermost shell electrons as dots surrounding the element symbol.
• The line between elements represents the bonded electrons.
• Dots represent lone pair of electrons.

Step to draw electron dot structure

• Write down the chemical symbol of the element.
• Find the number of valence electrons.
• Draw the valence electrons as dots near the element.

Electron dot structure of calcium $\left(\mathrm{Ca}\right)$

• The atomic number of calcium is $20$
• The electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^{6}4{\mathrm{s}}^2$
• The distribution of electrons in the shell is $2,8,8,2$
• Therefore, the number of valence electrons in calcium is $2$
• So, the electron dot structure of calcium is:

Electron dot structure of sulphur $\left(S\right)$

• The atomic number of sulphur is $16$
• The electronic configuration is $1{\mathrm{s}}^{2}2{\mathrm{s}}^{2}2{\mathrm{p}}^{6}3{\mathrm{s}}^{2}3{\mathrm{p}}^4$
• The distribution of electrons in the shell is $2,8,6$
• Therefore, the number of valence electrons in sulphur is $6$
• So, the electron dot structure of sulphur is: