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.
Why is Quechua still present in modern-day South America?
A) It is a required subject in every school.
B) It was brought by European invaders and perpetuated throughout the continent.
C) It is an indication of wealth and achievement.
D) It was imposed on every tribe conquered by the Incas.
Answer: Option D
<u>Explanation:</u>
Incas was also known as the Inca Empire or the Incan Empire was known as the largest empire in pre-Columbian America. Most of the scholars do consider its political and administrative structure. And these structure are considered as the most developed Empire in the Americans before the arrival of the Columbus happened.
The correct answer is lake titicaca
The answer is: D. How regions differ from each other
A...twenty countries whose people share a common religion and cultural heritage
C...The worlds largest fresh water lake
D...China and England
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