I believe Mendeleev formed his periodic table by atomic weight (nowadays we do it by atomic number) so he likely used those values.
In a chemical change, the atoms in the reactants rearrange themselves and bond together differently to form one or more new products with different characteristics than the reactants. When a new substance is formed, the change is called a chemical change.
Answer:
Density independent factor
Explanation:
in dense areas where people livein very close and tight spaces
The third one is correct, not sure abt another one
Answer:
:) ..................................................................:)
