Physics (AS & A Level) · May / June 2025 · Paper 41 · Question 2
9702
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A helium atom may be modelled as a nucleus surrounded by two electrons in diametrically opposite circular orbits, each of radius 170 pm, as shown in Fig. 2.1. 170 pm electron electron orbit of electrons nucleus Fig. 2.1
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2(a)[2]
2(b)(i)[1]
2(b)(ii)[1]
2(c)(i)[2]
2(c)(ii)[2]
2(d)(i)[2]
2(d)(ii)[1]
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