He thought elements that haven't been discovered belonged in the place of the gap. He could also use the atomic mass of the missing elements
A base is weak when only a little of it dissolved in Water.
It images help u...
chemical changes occur when a substance combines with another to form a new substance called chemical synthesis or alternatively chemical decomposition into two or more different substances these processes are called chemical reactions and in general are not reversible except by further chemical reactions
Answer:
80 is the correct answer i think I'm not sure
