Question

the following bohr model diagrams describe the number of electrons in different electron shells. which of the four models is incorrect? the electrons in the outermost shell are known as electrons.

Explanation:

Step1: Recall Bohr - model rules

Electrons fill shells in a specific order. First shell holds max 2, second 8, third 8 etc.

Step2: Analyze diagrams

Check each diagram for electron - shell filling violations.

Step3: Identify valence electrons

Outer - most shell electrons are valence electrons.

Answer:

1. (No diagrams shown to determine incorrect model)
2. Valence