.When dilute HCl is added to powdered egg shell, a gas is formed. a) Name the gas formed. (1) b) Write the name of acid formed when this gas dissolves in water. (1) c) Give the name of the salt formed when this acid reacts with potassium hydroxide.(1)

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.