What are all substances made from?, Molecules only, Atoms, Cells, Compounds, What is found at the centre of an atom?, A) Electrons, B) Shells, C) The nucleus, D) Molecules, Which particle has a positive charge?, A) Electron, B) Neutron, C) Proton, D) Ion, Which particle has a negative charge?, A) Proton, B) Electron, C) Neutron, D) Nucleus, Which particle has no charge?, A) Proton, B) Electron, C) Neutron, D) Ion, Where are electrons found?, A) In the nucleus, B) In shells around the nucleus, C) Inside protons, D) Inside neutrons, Which statement about atoms is correct?, A) Atoms are mostly empty space, B) Atoms contain no particles, C) Atoms are solid balls, D) Atoms have no nucleus, What is the relative mass of a proton?, A) 0, B) 0.5, C) 1, D) 2, What is the relative mass of an electron?, A) 1, B) 0, C) 2, D) 10, What does the atomic number tell you?, A) Number of neutrons, B) Number of electrons, C) Number of protons, D) Number of shells, An atom has an atomic number of 6. How many protons does it have?, A) 3, B) 6, C) 12, D) 18, A neutral atom has 12 protons. How many electrons does it have?, A) 6, B) 10, C) 12, D) 24, What is the mass number?, A) Protons + neutrons, B) Protons + electrons, C) Neutrons + electrons, D) Electrons only, An atom has a mass number of 23 and an atomic number of 11. How many neutrons does it have?, A) 11, B) 12, C) 23, D) 34, An atom has 17 protons and 17 electrons. What is its overall charge?, A) Positive, B) Negative, C) Neutral, D) Unknown

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