As scientists have learned more about atoms, models of atoms have changed. One of the first atomic models was a solid balk, such as a marble. What are two limitations of using a marble to model an atom?

The ph of carrots are 5.0 how it is classified a. acidic b. basic c. indicator d. neutral

How much energy is made when a pice of wood burns. how do you know

For each of the following compounds, write the formula then predict whether it would be a strong, weak, or non-electrolyte when placed in di water. for the ionic compounds only, put (s) or (aq) after the forrmula formula strong, weak or non electrolyte? a calcium hydroxide b. silver carbonate c. lead(ii) sulfate d. phosphorus trifluoride e. sodium phosphide f barium sulfate g. strontium acetate h. zinc nitrate