Why are electron dot diagrams useful?
(Own Sentence)

Lewis electron dot diagrams use dots to represent valence electrons around an atomic symbol. Lewis electron dot diagrams for ions have fewer (for cations) or more (for anions) dots than the corresponding atom.

Electron dot diagrams use dots to represent valence electrons around an atomic symbol. Electron dot diagrams for ions have fewer or more dots than the corresponding atom

Explanation:

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.

i think it is d. objects resist changes in their state of motion.