Final answer:
A Lewis electron-dot symbol is a representation of the valence electrons of an atom, using dots around the symbol of the element. The number of dots corresponds to the number of valence electrons. The dots are arranged around the symbol, with no more than two dots on a side.
Step-by-step explanation:
A Lewis electron-dot symbol, also known as a Lewis symbol or Lewis electron-dot diagram, is a representation of the valence electrons of an atom. The dots are placed around the symbol of the element and the number of dots corresponds to the number of valence electrons. The dots are arranged to the right and left, and above and below the symbol, with no more than two dots on a side. In the example you provided, the "Ö" represents an oxygen atom with four p electrons.