AQA GCSE chemistry C1 Verified Solutions
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AQA GCSE chemistry C1 Verified Solutions 1. What is the central part of an atom called? Answer: The nucleus 2. What are the charges and relative masses of protons, electrons, and neutrons? Answer: Protons: +1, 1; Electrons: -1, 0.0005; Neutrons: 0, 1 3. Why are atoms neutral? Answer: Because the positive charge of protons and zero charge of neutrons are balanced by the negative charge of electrons 4. What is the difference between an element and a compound? Answer: An element i...