examine the mass spectrum of element z below. use it to answer questions 9 - 11.\n9. choose the statement…

examine the mass spectrum of element z below. use it to answer questions 9 - 11.\n9. choose the statement below that is true:\na) peak f represents an isotope with 3 more protons than the isotope shown by peak c\nb) peak f represents the isotope with the greatest number of neutrons\nc) there are seven ions of element z.\nd) all seven peaks represent atoms with the same atomic number.\n10. which peak has the greatest relative intensity? what does this mean?\na) peak f; this atom has the greatest relative abundance in nature.\nb) peak f; this atom has the greatest number of neutrons.\nc) peak g; this atom has the greatest relative abundance in nature.\nd) peak g; this atom has the greatest number of neutrons.\n11. the identity of element z is:\na) platinum\nb) gold\nc) mercury\nd) thallium

examine the mass spectrum of element z below. use it to answer questions 9 - 11.\n9. choose the statement below that is true:\na) peak f represents an isotope with 3 more protons than the isotope shown by peak c\nb) peak f represents the isotope with the greatest number of neutrons\nc) there are seven ions of element z.\nd) all seven peaks represent atoms with the same atomic number.\n10. which peak has the greatest relative intensity? what does this mean?\na) peak f; this atom has the greatest relative abundance in nature.\nb) peak f; this atom has the greatest number of neutrons.\nc) peak g; this atom has the greatest relative abundance in nature.\nd) peak g; this atom has the greatest number of neutrons.\n11. the identity of element z is:\na) platinum\nb) gold\nc) mercury\nd) thallium

Answer

Explanation:

Step1: Recall isotope concept

Isotopes of an element have the same atomic number but different mass - numbers due to different numbers of neutrons. Peaks in a mass - spectrum represent isotopes of an element.

Step2: Analyze option a

We don't know the mass - numbers precisely enough to determine the difference in protons between isotopes represented by peak F and peak C just from the graph, so option a is incorrect.

Step3: Analyze option b

We can't determine which isotope has the most neutrons just from the relative intensity and mass - number values shown on the graph without more information, so option b is incorrect.

Step4: Analyze option c

The peaks represent isotopes, not ions. Isotopes are neutral atoms with different numbers of neutrons, so option c is incorrect.

Step5: Analyze option d

All the peaks in the mass - spectrum of an element represent isotopes of that element. Isotopes have the same atomic number. So option d is correct.

Step6: Analyze question 10

The relative intensity of a peak in a mass - spectrum is proportional to the relative abundance of the corresponding isotope in nature. The tallest peak has the greatest relative intensity. From the graph, peak F is the tallest.

Step7: Analyze question 11

We need to know the average atomic mass of the element. But if we assume the major isotopes and their abundances are represented in the mass - spectrum, and considering the mass - number range shown (around 196 - 204 amu), mercury has isotopes in this mass - number range. Platinum has a range around 190 - 198 amu, gold has a single stable isotope of mass number 197 amu, and thallium has isotopes with mass numbers around 203 - 205 amu but its main isotope is 205 amu. Mercury has multiple isotopes in the range shown in the mass - spectrum.

Answer:

  1. d) All seven peaks represent atoms with the same atomic number.
  2. a) Peak F; this atom has the greatest relative abundance in nature.
  3. c) Mercury