Page 02 SECTION 1 — 30 marks Attempt ALL questions 1. Which of the following lists electromagnetic radiation bands in order of increasing wavelength? A X-ray, infrared, ultraviolet, radio B Infrared, ultraviolet, X-ray, gamma C Ultraviolet, visible, infrared, radio D Radio, infrared, visible, gamma 2. Which of the following states that electrons fill orbitals in order of increasing energy? A Hund’s rule B The aufbau principle C The Pauli exclusion principle D The valence shell electron pair repulsion theory 3. X In the periodic table outlined above, one area is marked X. Moving across area X, from one element to the next, the extra electron usually occupies an orbital of type A s B p C d D f. 4. Which of the following molecules contains three atoms in a straight line? A BF3 B CH4 C H2O D SF6