Question

2b. below is a bohr model of a neutral atom. based on the model, a student says that the atom has 3 valence electrons. is the student correct or incorrect? explain your answer

Explanation:

Step1: Identify electron - shell arrangement

In a Bohr model, electrons are arranged in shells. The first shell can hold 2 electrons, the second shell can hold 8 electrons, and the out - most shell holds valence electrons.

Step2: Count electrons in each shell

The first shell has 2 electrons, the second shell has 8 electrons, and the third shell has 1 electron.

Step3: Determine valence electrons

Valence electrons are in the outermost shell. Here, the outermost shell (third shell) has 1 electron.

Answer:

The student is incorrect. The atom has 1 valence electron.