Question

exit ticket: lewis dot diagrams practice
which of the following electron dot notations is correct for the element argon, ar, atomic #18?

Explanation:

Argon has an atomic number of 18 and a full - outer electron shell with 8 valence electrons. In a Lewis dot diagram, the symbol for the element is surrounded by dots representing valence electrons. The correct Lewis dot diagram for argon shows 8 dots (2 on each side of the symbol).

Answer:

The option with the symbol 'Ar' surrounded by 8 dots (2 on each of the four sides of the symbol) is correct.