1. you are asked to make 200 mls of a 20mm working (diluted) solution of nacl using a 2m stock solution. record the volume of 2m stock solution and the volume of water you would use the make the working (diluted) solution.

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.