BMAT – Chemistry Final Exam Questions and 100% Correct Answers

what happens to the solubility of gases as pressure increases? increases what happens to the solubility of gases as temperature increases? decreases how is the chromatography retardation factor calculated? distance moved by compound/distance moved by solvent how is the relative atomic mass of an element calculated? (mass1 x abundance1) + (mass2 x abundance2)/ 100 what are the elements in group 1 referred to as? alkali metals what are the elements in group 7 referred to as? halogens what are the elements in group 0 referred to as? noble gases how many electrons can be in each energy shell of an atom? 2 8 8 what does the group number of an element reflect? the number of electrons in the outer shell what does the periodic number reflect? the number of occupied electron shells what is the avogadro number? 6x10^23 - the number of atoms 1 mole of atoms contains what is the mass of one mole of H20? 18g how is number of moles calculated? mass/relative formula mass what is the molar volume of gas? 1 mole of gas has a volume of 24dm3 at room temperature how is the volume of gas at room temperature calculated? moles x 24 how is the periodic table arranged? in increasing atomic mass where are transition metals on the periodic table? between groups 2 and 3 what happens to the metallic properties of elements as you move from left to right across the periodic table? decreases what non-metal element can conduct electricity? graphite non-metal + oxygen = ? non-metal oxide what is the chemical formula for sulphuric acid? H2SO3 metal + oxygen = ? metal oxide what are 3 properties of noble gases? monatomic colourless unreactive name 3 noble gases? helium neon argon what happens to reactivity as you go down group 1? increases