IB Chemistry SL only Topic 3 Periodicity LIVE VERSION OLD VERSION

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IB Chemistry SL only Topic 3 Periodicity LIVE VERSION (OLD VERSION) • Please go to new version: • IB Chemistry Topic 3 Periodicity 3.1 ... • A review of 3.1 and 3.2 in class. Please let me know if you prefer my usual style of video or the live version in the comments below. Thanks! • PPTs can be viewed on http://www.mrwengibchemistry.com/ • 3.1 Periodic table • • The periodic table is arranged into four blocks associated with the four sub-levels—s, p, d, and f. • • The periodic table consists of groups (vertical columns) and periods (horizontal rows). • • The period number (n) is the outer energy level that is occupied by electrons. • • The number of the principal energy level and the number of the valence electrons in an atom can be deduced from its position on the periodic table. • • The periodic table shows the positions of metals, non-metals and metalloids. • • Deduction of the electron configuration of an atom from the element’s position • 3.2 Periodic trends • • Vertical and horizontal trends in the periodic table exist for atomic radius, ionic radius, ionization energy, electron affinity and electronegativity. • • Trends in metallic and non-metallic behaviour are due to the trends above. • • Oxides change from basic through amphoteric to acidic across a period. • • Prediction and explanation of the metallic and non-metallic behaviour of an element based on its position in the periodic table. • • Discussion of the similarities and differences in the properties of elements in the same group, with reference to alkali metals (group 1) and halogens (group 17). • • Construction of equations to explain the pH changes for reactions of Na2O, MgO, P4O10, and the oxides of nitrogen and sulfur with • Connect with me: • Facebook: / ibchemistry2016

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