Based on the reading, what are the properties of carbon-14? Check all that apply. Carbon-14 is a naturally occurring carbon isotope. Carbon-14 has a known half-life. Carbon-14 decays completely within 1,000 years. Carbon-14 is not radioactive. Carbon-14 is present in all living organisms.

Carbon-14 is a naturally occurring isotope of carbon, and its radioactive decay has a known half-life of about 5,730 years. It is radioactive, so the claim that it is not radioactive is false; it also does not decay completely within 1,000 years. Living organisms take in carbon, including trace amounts of carbon-14, while they are alive.

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