What is radioactive decay?, the spontaneous breakdown of an atom's nucleus n , What is spectroscopy?, indentifying chemicals by studying light the emit and absorb, What is physical constant ?, a quantity in nature that never changes , What is ground state?, the lowest energy state of a particle , What colors are ROY G BIV?, red, orange,yellow,green,blue indigo and violet , What are the ingredients in an atomic bomb?, enriched uranium or U-235, What is most abundant isotope of Calcium? , Ca -40, How many protons are in Oxygen? , 16, How many electrons does Magnesium have? , 12, How many neutrons does Cl-37 have?, 20.

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