Which mixture is classified as a 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.

How many moles of bromine are needed to produce 3.23 moles of potassium bromide

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm