Question

12 multiple choice 5 points model of a na atom is shown below: b. what is the number of valence electrons for the na atom? 1 2 11

Explanation:

Step1: Recall electron - shell filling rules

Electrons fill shells in a specific order. The first shell can hold a maximum of 2 electrons, the second shell can hold a maximum of 8 electrons. Sodium (Na) has an atomic number of 11, so it has 11 electrons. The first shell has 2 electrons, the second shell has 8 electrons, and the remaining 1 electron is in the outermost shell.

Step2: Define valence electrons

Valence electrons are the electrons in the outermost shell of an atom.

Answer:

1. Option Text