Indium Has Two Naturally Occurring Isotopes with Masses Given in the Table

question 1

Multiple Choice

Indium has two naturally occurring isotopes with masses given in the table below. The relative atomic mass given for antimony on the periodic table is 114.82. When a natural sample of indium is placed in a mass spectrometer, which of the following will be true?

• A) Three peaks will be observed at 112.9043, 114.82, and 114.9041 amu.
• B) Two peaks will be observed and the ¹¹³In will be larger.
• C) One peak will be observed at the average relative atomic mass.
• D) Two peaks will be observed and the ¹¹⁵In will be larger.
• E) Not enough information is given to answer the problem.

---

Definitions:

Antisocial Personality Disorder

A mental condition characterized by a long-term pattern of manipulating, exploiting, or violating the rights of others.

Rule-Breaking

The act of violating established guidelines, norms, or laws.

Aggressiveness

A behavior characterized by the intention to harm or assert dominance over another, either physically or verbally.

Cognitive Theorists

Scholars and psychologists who study the mental processes involved in knowing, including aspects such as awareness, perception, reasoning, and judgment.