Answer:
The correct options are: a. the number of additional neutrons of an isotope is too large; d. the number of additional neutrons of an isotope is too small
Explanation:
The chemical elements that have the same number of protons in the nucleus but different number of neutrons are known as isotopes. Isotopes can be stable or unstable.
The isotope having an unstable nucleus, due to the presence of additional neutrons in the nucleus of the atom, is known as a radioisotope.
Also, chemical elements that have atomic number greater than 83 have unstable nuclei and thus they are called radioisotopes.
Answer:
d. all of the above
Explanation:
The three are cultural symbols of Oklahoma.
The historic Route 66 rans through the middle of the state, including the city of Tulsa, the second-largest in the state.
American Indian heritage is also important in Oklahoma. The entirety of Oklahoma used to be Indian reservation territory, and there are still important Indian reservations there.
Finally, cowboy culture is also remarkable. Oklahoma has been a state with an important livestock sector economy, and cowboys used to be employed en masse in the nineteenth century and early twentieth century.
The Mekong River flows through the countries China, Myanmar, Thailand, Laos, Cambodia, and Viet Nam.
