1) Which of the following does the nucleus contain? a) protons and electrons b) protons and neutrons c) neutrons and electrons 2) Which of the following statements is correct? a) Protons have a positive charge and neutrons are negative b) Protons have a negative charge and electrons are positive c) Protons have a positive charge and electrons are negative 3) What is the atomic number? a) The number of atoms it contains b) The number of protons it contains c) The number of neutrons it contains 4) In an atom: a) number of protons = number of electrons b) number of protons = number of neutrons c) number of neutrons = number of electrons 5) Tick the statement that is true for Group 1 metals found in the Periodic Table a) Potassium is more reactive than Sodium. b) Lithium is the most reactive element. c) Reactivity decreases down the group. 6) The atomic number of zinc is 30. How many electrons does its atom contain? a) 60 b) 28 c) 30 7) What is the charge on an electron? a) +1 b) -1 c) 0 8) The atomic number of sulphur is 16 and it has 16 neutrons. What is its mass number? a) 32 b) 16 c) 24 9) Mass number (number on the top) is the sum of a) Number of protons and neutrons b) Number of neutrons and electrons c) Number of protons and electrons 10) The mass number of iron is 56. The atomic number is 26. How many neutrons does iron have? a) 26 b) 30 c) 82 11) What is unique about Group 0 elements? a) They are all solids. b) They are unreactive. c) They form colourful compounds in air. 12) The mass number of an arsenic atom is 75 and it has 33 electrons. What is its atomic number? a) 75 b) 42 c) 33

KS3 Atomic structure quiz

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