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: Be...
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 is a substance composed of only one type of atom, while a compound is a
substance formed by combining two or more elements chemically
5. What do elements in the same group have in common?
Answer: Elements in the same group share similar chemical properties due to having similar electron
configurations
6. What is unique to each element in terms of its atomic structure?
Answer: The number of protons, electrons, or neutrons can vary between elements
7. Where are metals typically found on the periodic table?
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