Question

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.

Explanation:

• Carbon - 14 is a naturally occurring carbon isotope (this is a known property of Carbon - 14).
• Carbon - 14 has a known half - life (its half - life is about 5730 years, so it has a known half - life).
• Carbon - 14 decays completely within 1,000 years: This is incorrect. The half - life of Carbon - 14 is about 5730 years, so it does not decay completely in 1000 years.
• Carbon - 14 is not radioactive: This is incorrect. Carbon - 14 is a radioactive isotope.
• Carbon - 14 is present in all living organisms (living organisms take in Carbon - 14 through the carbon cycle, so it is present in all living organisms).

Answer:

• Carbon - 14 is a naturally occurring carbon isotope.
• Carbon - 14 has a known half - life.
• Carbon - 14 is present in all living organisms.