In old-time photography flash bulbs were made by burning magnesium metal to produce a very bright light. How many molecules of O2 is needed to completely burn 12.0 g of magnesium.

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

the answer would be a

answer; 4 electrons;

the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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