The number of valence electrons in sulfur is 6. In its highest energy occupied electron shell, it has 6 electrons (3s2 and 3p4, summing to 6 electrons, to be exact).
Answer:
D) I think is single displacement (replacement)
The last one should be the correct answer
2. CuCl₂·2H₂O is limiting reactant.
Chemical reaction: 3CuCl₂·2H₂O + 2Al → 3Cu + 2AlCl₃ + 6H₂O. m(Al) = 0,5 g.
Answer: Atoms that have lost or gained electrons and are now charged (different number of electrons). By putting the correct amount of protons and neutrons in the center, and you cannot have more than 2 protons/neutrons than the other if you want it to be stable. The number of protons determines the name of the element.
