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2023 · M/J · 5054/12 | Q35

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CIE-5054-2023-MJ-p12 · Question 35

You may use a calculator. Take the weight of 1.0 kg to be 9.8 N (acceleration of free fall = 9.8 m/s²).
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35 The only stable isotope of gold, Au, has 79 protons and 118 neutrons in a nucleus of an atom. How many elecrons are there in a neutral atom of this isotope? A 39 B 79 C 118 D 197

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5054/12/M/J/23Cambridge O Level Physics 5054 · May/June 2023 · Paper 1 variant 2 · Question 35