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SELF ASSESSMENT

Self assess your understanding and skills of topic 2 (SL) + 12 (HL) for each sub topic, by selecting yes, no, maybe depending on if you understand or able to do what is stated. Submit your response for each subtopic.

2.1 Understandings

* Indicates required field

U1. Atoms contain a positively charged dense nucleus composed of protons and neutrons (nucleons). *

U2. Negatively charged electrons occupy the space outside the nucleus. *

U3. The mass spectrometer is used to determine the relative atomic mass of an element from its isotopic composition. *

Application and Skills 2.1

AS1. Use of the nuclear symbol notation (_Z^A)X to deduce the number of protons, neutrons and electrons in atoms and ions. *

AS2. Calculations involving non-integer relative atomic masses and abundance of isotopes from given data, including mass spectra. *

Submit

2.2 Understandings 2.2

* Indicates required field

U1. Emission spectra are produced when photons are emitted from atoms as excited electrons return to a lower energy level. *

U2. The line emission spectrum of hydrogen provides evidence for the existence of electrons in discrete energy levels, which converge at higher energies. *

U3. The main energy level or shell is given an integer number, n, and can hold a maximum number of electrons, 2n2. *

U4. A more detailed model of the atom describes the division of the main energy level into s, p, d and f sub-levels of successively higher energies. *

U6. Each orbital has a defined energy state for a given electronic configuration and chemical environment and can hold two electrons of opposite spin. *

Submit

Application and skills 2.2

* Indicates required field

AS1. Description of the relationship between colour, wavelength, frequency and energy across the electromagnetic spectrum. *

AS2. Distinction between a continuous spectrum and a line spectrum. concentration of metallic elements. *

AS3. Description of the emission spectrum of the hydrogen atom, including the relationships between the lines and energy transitions to the first, second and third energy levels. *

AS4. Recognition of the shape of an s atomic orbital and the px, py and pz atomic orbitals. *

AS5. Application of the Aufbau principle, Hund’s rule and the Pauli exclusion principle to write electron configurations for atoms and ions up to Z = 36. *

Submit

TEST - PAST PAPER QUESTIONS

Check your understanding and skills of topic 2 (SL) + 12 (HL) by answering the following past exam questions that are matched with the statements and submit your answers.

2.1 Understandings 2.1

* Indicates required field

U1. Which is the correct definition of the mass number of an atom? (1 mark) *

A. The total mass of neutrons and protons in the nucleus of the atom B. The total mass of neutrons, protons and electrons in the atom C. The number of protons in the nucleus of the atom D. The total number of neutrons and protons in the nucleus of the atom

U3. Rubidium contains two stable isotopes, 85Rb and 87Rb. The relative atomic mass of rubidium is given in the Periodic Table. The percentage of each isotope can be checked experimentally using a mass spectrometer.  A vaporised sample of pure rubidium is ionised and then accelerated in a mass spectrometer. Outline how the use of a magnetic field and a detector in the mass spectrometer enables the percentages of the two isotopes to be determined. (3 mark) *

U3. State three factors that affect the degree of deflection of ions in a mass spectrometer. (3 mark) *

Applications and skills 2.1

AS1. Which statement about the species 63Cu2+ and 65Cu+ is correct? (1 mark) *

A. Both species have the same number of protons. B. Both species have the same number of electrons. C. Both species have the same number of neutrons. D. Both species have the same electron arrangement.

AS2. Rubidium contains two stable isotopes, 85Rb and 87Rb. The relative atomic mass of rubidium is given in the Periodic Table. Calculate the percentage of each isotope in pure rubidium. State your answers to three significant figures. (2mark) *

Submit

Application and skills 2.2

* Indicates required field

AS1. List the following types of electromagnetic radiation in order of increasing wavelength (shortest first): Yellow light, Red light, Infrared radiation, Ultraviolet radiation. (1 mark) *

AS2. Distinguish between a continuous spectrum and a line spectrum. (1 mark) *

AS3. Draw and label an energy level diagram for the hydrogen atom. In your diagram show how the series of lines in the ultraviolet and visible regions of its emission spectrum are produced, clearly labelling each series. (4 marks) *

Answer all 3 subquestions in the space below *

Submit

HL 12.1

Understandings 12.1 (HL)

* Indicates required field

U 12.2 The graph of the first ionisation energy plotted against atomic number for the first twenty elements shows periodicity. (i) Define the term first ionization energy and state what is meant by the term periodicity. (2 mark) (ii) Explain how information from this graph provides evidence for the existence of main energy levels and sub-levels within atoms. (4 mark) *

U3. The graph below represents the successive ionisation energies of sodium. The vertical axis plots log (ionisation energy) instead of ionisation energy to allow the data to be represented without using an unreasonably long vertical axis. State the full electron configuration of sodium and explain how the successive ionisation energy data for sodium are related to its electron configuration. (4 mark) *

Application and skills 12.1

In which group of the periodic table would the unknown element be found? (1 mark) *

A. 1 B. 2 C. 3 D. 4

AS4. What is the electron configuration for the copper(I) ion, (Z = 29)? (1 mark) *

A B C D

Submit

Enjoy revision with this unit's escape room

Test Understandings and Slills
Chapter 2 + 12

SELF ASSESSMENT

2.1

Understandings

Application and Skills 2.1

2.2

Understandings 2.2

Application and skills 2.2

HL 12.1

Understandings 12.1 (HL)

Application and skills 12.1

TEST - PAST PAPER QUESTIONS

2.1

Understandings 2.1

Applications and skills 2.1

2.2

Understanding 2.2

Application and skills 2.2

HL 12.1

Understandings 12.1 (HL)

Application and skills 12.1

Enjoy revision with this unit's escape room

Test Understandings and Slills Chapter 2 + 12

SELF ASSESSMENT

2.1

Understandings

Application and Skills 2.1

2.2

​Understandings 2.2

​Application and skills 2.2

HL 12.1

​Understandings 12.1 (HL)

​Application and skills 12.1

TEST - PAST PAPER QUESTIONS

2.1

​Understandings 2.1

Applications and skills 2.1

2.2

​Understanding 2.2

​Application and skills 2.2

HL 12.1

​Understandings 12.1 (HL)

Application and skills 12.1

Test Understandings and Slills
Chapter 2 + 12

Understandings 2.2

Application and skills 2.2

Understandings 12.1 (HL)

Application and skills 12.1

Understandings 2.1

Understanding 2.2

Application and skills 2.2

Understandings 12.1 (HL)