1) An element a) [One or more of the same atom. b) Two or more different types of atoms. c) Two or more atoms of any type. 2) A compound. a) One or more of the same atom. b) Two or more different types of atoms. c) Two or more atoms of any type. 3) A molecule. a) One or more of the same atom. b) Two or more different types of atoms. c) Two or more atoms of any type. 4) Positively charged sub-atomic particle. a) Proton b) Neutron c) Electron d) Nucleon 5) Negatively charged sub-atomic particle with almost no mass. a) Proton b) Neutron c) Electron d) Nucleon 6) Sub-atomic particle with no charge but mass. a) Proton b) Neutron c) Electron d) Nucleon 7) Atomic Number a) Number of protons b) Number of electrons c) Number of neutrons d) Number of protons and neutrons e) Number of protons and electrons 8) Nucleon Number a) Number of protons b) Number of electrons c) Number of neutrons d) Number of protons and neutrons e) Number of protons and electrons 9) Valence electrons a) Electrons in first shell b) Electrons in second shell c) Electrons in third shell d) Electrons in the outermost shell 10) Isotopes have a .... a) different number of protons b) different number of electrons c) different number of neutrons 11) The first shell holds ____ electrons. a) 1 b) 2 c) 3 d) 4 12) The second shell holds ____ electrons. a) 2 b) 4 c) 6 d) 8 13) The third shell holds ____ electrons. a) 2 b) 8 c) 18 d) 20

IGCSE T2 Atomic Structure

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