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5.1 The nuclear model of the atom

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Question 93
a.

How many protons are in the nucleus of an atom of 88226Ra^{226}_{88}\text{Ra}88226​Ra?

[1]
b.

How many neutrons are in the nucleus of an atom of 88226Ra^{226}_{88}\text{Ra}88226​Ra?

[1]
c.

How many electrons are in a neutral atom of 88226Ra^{226}_{88}\text{Ra}88226​Ra?

[1]
d.

Where in the atom are these electrons to be found?

[1]
e.

When a nucleus of 88226Ra^{226}_{88}\text{Ra}88226​Ra decays by emitting an alpha-particle, it becomes a nucleus of radon (Rn\text{Rn}Rn).

The equation below represents this process:

88226Ra→YXRn+24α ^{226}_{88}\text{Ra} \rightarrow ^{X}_{Y}\text{Rn} + ^4_2\alpha 88226​Ra→YX​Rn+24​α

Deduce the values of XXX and YYY.

[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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