53. Two atoms are found to contain the same number of neutrons. Can we use this information to determine that they are the same element? Explain.
58.
How does the mass number and the atomic mass given on the periodic table differ?
59. Cu is an isotope of Copper; what is the atomic number and the atomic mass
number?

Inside a flashbulb, oxygen surrounds a thin coil of magnesium. when the flashbulb is set off, a chemical reaction takes place in which magnesium combines with oxygen to form magnesium oxide. which of the chemical equations matches the reaction above? a. mg + o2 mgo2 + energy b. 2mg + o mg2o + energy c. 2mg + o2 2mgo + energy d. mg + o mgo + energy