The unique optomap ultra-widefield view helps your eye care practitioner detect early signs of retinal disease more effectively and efficiently than with traditional eye exams. Early detection means successful treatments can be administered and reduces the risk to your sight and health.
An electron dot diagram is a method of writing the chemical symbol of an element by surrounding it with dots to indicate the number of valence electrons. Valence electrons are found in an atom's outer shell and are the ones involved in chemical reactions.
Subtract its electron configuration from the electron configuration of an atom of the element you are given. For sodium, this gives us d^1. 3. Append the symbol of the gas, enclosed in square brackets, to the left side of the electron configuration of an atom of your element. So the noble gas configuration of an atom of sodium is written as [Ne]d^1.