2 mole Na needs 1 mole Cl2
4 mole Na = 2 mole Cl2
I am pretty sure the answer is A
Answer:
the answeer is definitely silicon.
Answer:
Periods
Explanation:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.