Your answer to this question is B
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:
A. is a gravity-driven downslope movement of natural materials.
Explanation:
Mass movement -
It is also called , the slope movement , mass wasting .
it is a process , by which , the sand , rock , soil , regolith move towards downslope by the force of gravity .
It includes , slides , falls , topples , creep .
Mass movement is observed in planets other than Earth , like the Mars , Jupiter , Venus .
Hence , from the given option , the correct option for the definition of Mass movement is ( A ) .
Answer:
Fast
Explanation:
For a river that deposits small particles where it flows into a sea, the current is likely to be fast.
A fast current is only able to winnow through the sediment and removes the fines.
- On reaching the river mouth with the sea, they settle and get deposited
- For a slow current, there is enough time for the energy to get along with the sediments.
- This ensures the proper drag of the particles throughout the session into a basin or the river mouth.
- Most fast currents are not usually deep enough to remove the coarse particles.
