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Transcript
Introduction to Geochemistry – Pre-lecture Quiz
(1) True or False?
(a) The diameter of an atom is less than the diameter of its nucleus.
(b) The relative atomic mass of an atom is the mass of an atom relative to an atom of 12C.
(c) p-orbitals can contain a maximum of 10 electrons.
(d) The first ionisation energy of an element is the energy input (in kg mol-1) required to
detach the loosest electron from atoms of that element.
(e) All alkali metals have similar chemical properties.
(f) Alkali earths have one electron in the outer shell.
(g) Electronegativity is the amount of negative charge on an atom.
(h) Ca has a valency of 2.
(i) True ionic bonds are unknown and all bonds in minerals possess some metallic character.
(j) The following reaction is balanced:
ZnS + O2  ZnO + SO2
(k) Heat energy or enthalpy is represented by the symbol S.
(l) A reaction for which a negative G is calculated will proceed in the forward direction and
the reactants will be more stable than the products.
(2) Try to fill in the gaps:
(a) H = Hproducts - _________________________
(b) ___________________ = H - TS
(c) Each element has an atomic number (________) between 1 and 92.
(d) Li, Na and K are examples of _______________________.
(e) The [SiO4]4- unit forms a ________________________________________.