GCSE Atomic Structure

What subatomic particles would you find in the nucleus of an atom?

• Protons only
• Protons and Neutrons
• Neutrons and Electrons
• Protons and Electrons 

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

An element with a mass number of 11 and an atomic number of 5 has how many neutrons?

• 11
• 5
• 6
• 16

The image shows three isotopes of hydrogen. Which of the following correctly describes the meaning of an isotope?

• Atoms of the same element with the same number of electrons and neutrons but different numbers of protons

• Atoms of the same element with the same number of protons and neutrons but different numbers of electrons

• Atoms of the same element with the same number of electrons and protons but different numbers of neutrons

• Atoms of the same element with the same number of electrons, neutrons and protons

Which of the following types of radiation is most ionising over a short range?

• Alpha

• Beta

• Gamma

Which of the following is sufficient to prevent beta radiation passing through

• 1 cm paper

• 1 mm aluminium

• 5 cm paper

• 5 mm aluminium

• 1 cm lead

In the Rutherford Bohr experiment one observation noted was that most alpha particles fired at the gold foil passed straight through. What does this tell us about the structure of the atom?

• The nucleus was positively charged

• The nucleus was negatively charged

• The atom was made up mostly of empty space

• The atom was very dense and tightly packed with nucleons

Which of the following are methods for protecting a person from radioactivity?

• Distance

• Shielding

• Limiting time of exposure

• All of the above

Which of the following occurs when Bismuth-213 decays to Polonium-213?

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Which of the following occurs when Polonium-213 decays to Lead-209?

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