Answer:
The method used to find atomic mass depends on whether you're looking at a single atom, a natural sample, or a sample containing a known ratio of isotopes:
Look Up Atomic Mass on the Periodic Table If it's your first encounter with chemistry, your instructor will want you...
Sum of Protons and Neutrons for a Single Atom To calculate the atomic mass of a single
Physical change is changing physically it eg appearance while chemical change is the molecular bonds water is always defined as H2O and not change chemically. Hope this answers your question.
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A force is a push or pull to an object
