I have added new content to the bond order calculator mentioned at https://irthoughts.wordpress.com/2018/12/20/bond-order-calculator-tool/

The content added is to illustrate the risks of blindly relying on chemistry heuristics and old-school chemistry ideas. Essentially, it is debunked some few old-school chemistry ideas, like

  1. SO3 has a bond order of 2. Really?
  2. nitrogen cannot form five bonds. Really?
  3. octet rule expansion by means of using d orbitals. Really?
  4. bond order is the number of chemical bonds shared by two atoms. Really?

To access this content, visit http://www.minerazzi.com/tools/bond-order/calculator.php

Once there, navigate to the ‘What is computed?’ section, and then to the subsection ‘Beware of Blindly Relying on Chemistry Heuristics’.

Enjoy it.