1 Which property increases as we move from left to right across a period? A Atomic size B Metallic character C Ionisation energy D Number of shells
2 Which air pollutant is a major component of photochemical smog and is produced by vehicle exhaust? A Sulphur dioxide B Nitrogen oxides C Carbon monoxide D Particulates
3 Which environmental issue is caused by the increase of greenhouse gases? A Acid rain B Global warming C Ozone hole D Smog
4 Which property generally increases as we move from top to bottom in a group? A Ionization energy B Electronegativity C Atomic size D Electron affinity
5 Which scientist arranged elements in order of increasing atomic number in the modern periodic table? A Mendeleev B Moseley C Dalton D Rutherford
6 Transition elements show variable oxidation states because they: A Have completely filled d-orbitals B Can lose electrons from d-orbitals C Are highly reactive D Form only ionic compounds
7 Which gas is produced by the incomplete combustion of fossil fuels and is poisonous? A Carbon dioxide B Carbon monoxide C Sulphur dioxide D Nitrogen
8 Which gas makes up the largest part of the atmosphere by volume? A Oxygen B Nitrogen C Carbon dioxide D Argon
10 Which gas is present in the highest percentage in the atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
11 Which gas is the most abundant in Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
12 Which gas makes up the largest portion of Earth's atmosphere? A Oxygen B Nitrogen C Carbon dioxide D Argon
13 Across a period from left to right, ionisation energy generally: A Increases B Decreases C Remains the same D Becomes zero
14 CFCs are harmful because they: A Cause global warming B Deplete the ozone layer C Cause acid rain D Increase oxygen levels
15 Why are Group 1 elements stored in oil? A To prevent them from reacting with air and moisture B To make them shiny C To increase their reactivity D To change their colour
16 The natural greenhouse effect is important because it: A Makes Earth too hot B Keeps Earth warm enough for life C Causes acid rain D Depletes the ozone layer
17 Which chemicals are mainly responsible for the depletion of the ozone layer? A Carbon dioxide B Sulphur dioxide C Chlorofluorocarbons (CFCs) D Nitrogen oxides
18 Which gas is mainly responsible for the depletion of the ozone layer? A Carbon dioxide B Sulphur dioxide C Chlorofluorocarbons (CFCs) D Nitrogen
20 Which property generally increases as we move from left to right across a period? A Atomic size B Metallic character C Electronegativity D Number of shells
21 Who arranged the elements in order of increasing atomic number? A Mendeleev B Moseley C Newlands D Dobereiner
23 Which of the following is a characteristic physical property of Group 1 elements? A They are hard and have high density B They are soft and have low density C They are brittle and non-conductors D They are gases at room temperature
24 Which of the following is a physical property of Group 1 elements? A They are hard and brittle B They are soft and silvery-white C They are coloured gases D They are poor conductors of electricity
25 As we move down a group in the periodic table, the atomic size generally: A Increases B Decreases C Remains the same D First decreases then increases