AS Chemistry Periodicity-Group 7
Questions with Answers
Identify the Period 2 element, from carbon to fluorine that has the largest atomic
radius. Explain your answer. - Correct Answer -Carbon / C
-smallest nuclear charge / least attraction between protons (in the
nucleus) and electrons
-Similar shielding
Explain why the second ionization energy of carbon is higher than the first ionization
energy of carbon. - Correct Answer (More energy to) remove an electron from a
(more) positive ion / action
Deduce the element in Period 2, from lithium to neon that has the highest second
ionization energy. - Correct Answer Li
Explain how the gaseous atoms of rubidium are ionized in a mass spectrometer -
Correct Answer -Electron gun / high speed/high energy electrons
-Knock out electron(s)
By reference to the relevant part of the mass spectrometer, explain how the
abundance of an isotope in a sample of rubidium is determined. - Correct Answer -
Detector
-Current / digital pulses / electrical signal related to abundance
Predict whether an atom of 88Sr will have an atomic radius that is larger than,
smaller than or the same as the atomic radius of 87Rb. Explain your answer. -
Correct Answer -Smaller
-Bigger nuclear charge / more protons in Sir
-Similar/same shielding
State why more than the minimum energy is not used to ionize the sample of indium.
- Correct Answer So no more than 1 electron is knocked out/so only one electron is
knocked out/prevent further ionization
Give two reasons why the sample of indium must be ionized. - Correct Answer -
accelerate
-deflect
-detect
Give the meaning of the term relative atomic mass. - Correct Answer (Average)
mass of one mole of atoms
Questions with Answers
Identify the Period 2 element, from carbon to fluorine that has the largest atomic
radius. Explain your answer. - Correct Answer -Carbon / C
-smallest nuclear charge / least attraction between protons (in the
nucleus) and electrons
-Similar shielding
Explain why the second ionization energy of carbon is higher than the first ionization
energy of carbon. - Correct Answer (More energy to) remove an electron from a
(more) positive ion / action
Deduce the element in Period 2, from lithium to neon that has the highest second
ionization energy. - Correct Answer Li
Explain how the gaseous atoms of rubidium are ionized in a mass spectrometer -
Correct Answer -Electron gun / high speed/high energy electrons
-Knock out electron(s)
By reference to the relevant part of the mass spectrometer, explain how the
abundance of an isotope in a sample of rubidium is determined. - Correct Answer -
Detector
-Current / digital pulses / electrical signal related to abundance
Predict whether an atom of 88Sr will have an atomic radius that is larger than,
smaller than or the same as the atomic radius of 87Rb. Explain your answer. -
Correct Answer -Smaller
-Bigger nuclear charge / more protons in Sir
-Similar/same shielding
State why more than the minimum energy is not used to ionize the sample of indium.
- Correct Answer So no more than 1 electron is knocked out/so only one electron is
knocked out/prevent further ionization
Give two reasons why the sample of indium must be ionized. - Correct Answer -
accelerate
-deflect
-detect
Give the meaning of the term relative atomic mass. - Correct Answer (Average)
mass of one mole of atoms
