The ratio of carbon-14 to nitrogen-14 in an artifact is 1:7. Given that the half- life of carbon-14 is 5730 years, how old is the artifact?

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When a light bulb shines, it gives off light energy and energy. a. heat b. potential c. chemical d. electrical

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Iron is a transition metal with multiple oxidation numbers. (answer the following) a. what is the iron (ii) ion? how does it differ from the iron (iii) ion? b. if iron were to bond with oxygen, predict the formula for each oxidation number of iron. c. how would each formula be named?