10. In the ground state, atoms of the elements in Group 15 of the Periodic Table all have the same number of A) filled energy levels (shells)
B) occupied energy levels (shells)
C) neutrons in the nucleus
D) electrons in the valence shell

Compare and contrast physical changes with chemical changes.

If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution

Achemist 16 drop copper metal from copper chloride solution. the chemist place is 0.50 g of aluminum foil in a solution containing 0.75 g of copper (ii) chloride. a single replacement reaction takes place. which statement explains the maximum amount of copper that the chemist can extract using this reaction?