Answer:
Well they help us understand the properties of matter of course!
Answer:
The answer to your question is
21. gaseous H₂O at 120°
22. solid water at 0°C
Explanation:
Kinetic energy depends on the movement of the molecules, gaseous molecules have more movement than liquids and solids.
Potential energy is the stored energy in a body if solids have more potential energy than liquids and gases.
Answer:
Only columns
Step-by-step explanation:
The properties of elements vary as you go across a period or down a column.
However, the properties are most similar as you go down a column.
That's because all the elements in a column have the same number of valence electrons.
For example, they may all want to gain one electron, so they will all form the same types of compounds.
The valence electrons determine the chemical properties, so the elements in the same column have the most similar properties.
B. Hammering it into a new shape.
Hope this helps! Good luck! :)