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 valance electrons.

Explanation:

Step1: Recall Bohr - model rules

In Bohr model, K - shell (first shell) can hold max 2 electrons, L - shell (second) max 8, M - shell (third) max 18 etc. Check each model for violations.

Step2: Analyze models

Upon inspection, find the model that breaks electron - shell capacity rules.

Answer:

(No models shown to pick from, but the process is to find the one violating electron - shell capacity rules). For the second part: valence