-Each element gives off a specific colour of light
-these are known as emission spectra(unique to each element)
-if electrons absorb energy they can be bumped to a higher level
-when they fall to a lower lever they release that energy as light
Atomic Structure
-atoms are made up of parts called subatomic particles
-protons(positive), electrons(negative), neutrons(neutral)
-atomic number = # of protons
Isotopes
-the # of protons determine the type of element
-changing the # of neutrons change teh isotope of the element
-all isotopes ahve the same chemical properties
Mass Number
-mass # is total of protons and neutrons
-symbol givven to mass is A
-different isotopes have different masses
-mass number = atomic # + # of neutrons(A=Z+N)
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