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1. Complete each question below with an appropriate term: a) Un-reactive elements in the last group of the periodic table. b) Elements in group 2 of the periodic table. c) Elements between the main group elements. d) Elements in group 7 of the periodic table. 2. Name and write symbol for each element deseribed below; a) Alkali metal in period 4 : b) Halogen in period 2 : c) Alkaline-earth metal in period 3: d) Metalloid in period 3 : e) Noble gas in period 5 : 3. Complete each statement below with a suitable word or phrase: A) The "soccer ball" model of the atom is attributed to B) Thomson discovered the in 1897. C) Rutherford discovered that the atom was mostly hollow through the experiment. D) The number of protons in an atom is called the E) Isotopes of an atom have the same but different F) The group number of representative elements represents the