It might change because of the amout of rain that fell in the year and the melting of ice which allows the water amount to increase
When Newlands tried to create a periodic table, his tried to conform to the "Rule of Octaves" he had discovered. He had the right idea, in that if you arrange the elements by atomic weight there would be similarities every 7 elements (not 8 because noble gases hadn't been discovered yet) but he tried to push this rule so much that he would put multiple elements in the same box to try to keep the rule. Mendeleev, however, left gaps in this table for undiscovered elements, which paved the way for our modern periodic table.
Climate change from the use of metals i think sorry if i’m wrong that one seems the most ligit to me
No. Reactants: 1 silver, 1 chlorine; products: 4 silver, 4 chlorine. Therefore, not balanced.