Topic 6.1- Atomic Structure 0.0 / 5 ? PhysicsRadioactivityAtomic StructureIGCSEAQA Created by: Alice CullenCreated on: 01-01-17 17:23 What is the basic structure of an atom? A small central nucleus composed of protons and neutrons surrounded by electrons 1 of 9 What is the charge and relative mass of a proton? 1, +1 2 of 9 What is the charge and relative mass of a neutron? 1, 0 3 of 9 What is the charge and relative mass of an electron? Very small, -1 4 of 9 Why does an atom have no overall charge? Because the number of electrons is equal to the number of protons in the nucleus 5 of 9 How do atoms become ions? By loosing or gaining electrons 6 of 9 What are isotopes? Isotopes have the same number of protons but different numbers of neutrons 7 of 9 What is the proton or atomic number? The total number of protons in an atom 8 of 9 What is the nucleon or mass number? The total number of protons AND neutrons in an atom 9 of 9
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