What mass of zinc (in kg) is in a 3.50 kg roll of tin foil that is 92.5% tin and 7.5% zinc? 0.90 kg
O 0.26 kg
O 3.2 kg
O 0.47 kg
O 2.1 kg

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.