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5.1 The nuclear model of the atom

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Question 158
a.

Any atomic nucleus can be represented in the notation ZAX^{A}_{Z}\text{X}ZA​X.

(i) State which letter, AAA, X\text{X}X or ZZZ, is the:

  • proton number: ............................\text{............................}............................
  • nucleon number: ............................\text{............................}............................
  • chemical symbol: ............................\text{............................}............................

(ii) A nucleus of polonium-210 can be written as 84210Po{}^{210}_{84}\text{Po}84210​Po.

  1. Determine the number of electrons in a neutral atom of polonium-210.
number of electrons=............................ \text{number of electrons} = \text{............................} number of electrons=............................
  1. Determine the number of neutrons in a nucleus of polonium-210.
number of neutrons=............................ \text{number of neutrons} = \text{............................} number of neutrons=............................
[3]
b.

Explain what is meant by the term isotopes of an element.

....................................................................................................................................................\text{....................................................................................................................................................}....................................................................................................................................................

....................................................................................................................................................\text{....................................................................................................................................................}....................................................................................................................................................

[2]
Markscheme

5.1 The nuclear model of the atom Questions

  1. IGCSE
  2. /Physics
  3. /5.1 The nuclear model of the atom

284 exam-style questions on CIE IGCSE Physics 5.1 The nuclear model of the atom, covering 5.1.1a Structure of the atom and ions, 5.1.1b Alpha-particle scattering, 5.1.2a Composition of the nucleus and isotopes, 5.1.2b Proton number, nucleon number and nuclide notation, and 5.1.2c Nuclear fission and nuclear fusion. Each one has a worked solution and a mark scheme showing where the marks go.

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