A student finds a fossil and submits it for radiocarbon dating. The fossil is found to contain one-fourth the amount of carbon-14 that it has originally. What is the age of the fossil?

Why are the trends and exceptions to the trends in ionization energy observed?

Astudent is asked to identify and element that is pale yellow brittle solid and does not conduct electricity. at which location in this periodic table would the element most likely be found?

The identities of substances are the same before and after which type of change