Answer:
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Explanation:
A chemical change results from a chemical reaction, while a physical change is when matter changes forms but not chemical identity. Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input.
Answer:
the answer would depend on the motion if the surface
Hello again!
The energy levels of an atom can be classified as follows:
First level-2 electrons
Second level-8 electrons
Third level-18 electrons
Fourth level-32 electrons
If an atom has 3 electrons, 2 of them will be in the 1st energy level making the 3rd one be on the 2nd energy level. Good luck with your homework!