Scientists developed different models of the atom as new discoveries were made - AQA - GCSE Physics - Question 2 - 2023 - Paper 1
Question 2
Scientists developed different models of the atom as new discoveries were made.
Which particle in the atom was discovered first?
Tick (✓) one box.
Electron
Neutr... show full transcript
Worked Solution & Example Answer:Scientists developed different models of the atom as new discoveries were made - AQA - GCSE Physics - Question 2 - 2023 - Paper 1
Step 1
Which particle in the atom was discovered first?
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Answer
The particle that was discovered first in the atom is the electron. This discovery laid the groundwork for our understanding of atomic structure.
Step 2
Calculate the radius of a gold nucleus in femtometres.
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Answer
To calculate the radius of the gold nucleus, we use the formula:
extRadiusofgoldnucleus=1.7imes4.2
Calculating this gives:
extRadiusofgoldnucleus=7.14extfemtometres
Step 3
What are the charges on an alpha particle and a gold nucleus?
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Answer
An alpha particle and a gold nucleus are both positively charged. This is due to the protons in both particles.
Step 4
Which statement describes the force between the alpha particle and the gold nucleus?
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Answer
The correct statement is that there is a force of repulsion between the alpha particle and the gold nucleus, as both are positively charged.
Step 5
Which model in Table 1 was developed first?
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Answer
The model that was developed first is the Bohr model.
Step 6
Which model in Table 1 was developed last?
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Answer
The model that was developed last is tiny spheres that cannot be divided.
