A researcher rolls some clay into a ball and shows it to Zian, then squishes the clay into a pancake. Zian understands that the
amount of clay is the same in both. The researcher makes a row of 10 coins, then makes another row of 10 coins beneath it but spreads out the row so the coins are farther apart. Zian says the spread-out row has more coins in it. This seems to confirm the phenomenon Piaget called:
Answer: A mixture is a combination of two or more substances (elements or compounds) which is not done chemically. Mixtures are two types Homogeneous Mixtures and Heterogeneous mixtures.
Answer:Atomic model keep changing because the electrons around the nucleus are not fixed and they keeps rotating or changing their position in valence orbits around the nucleus.
