How many valence electrons does group 18 have?
Understand the Problem
The question is asking for the number of valence electrons in group 18 of the periodic table, which consists of noble gases. Each of these elements has a complete outer electron shell.
Answer
8 valence electrons, except for helium, which has 2.
Group 18 elements have 8 valence electrons, except for helium which has 2.
Answer for screen readers
Group 18 elements have 8 valence electrons, except for helium which has 2.
More Information
Group 18 elements are also known as noble gases, and their full valence shell makes them very stable and unreactive.
Tips
A common mistake is to overlook helium, which only has 2 valence electrons because it has just one electron shell.
Sources
- Valence electrons - CHEMISTRY COMMUNITY - Laurence Lavelle - lavelle.chem.ucla.edu
- 2.02 Periodic Trends - ACCESS Virtual Learning - accessdl.state.al.us
- All about Valence Electrons by Group - Unacademy - unacademy.com
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