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Unformatted text preview: Calculate the heat in Joules: 5. Give an example of each of the following (provide the name or symbol): a) An alkali in the third period – sodium (Na) b) A chalcogen in the fourth period – selenium (Se) c) A neutral element with 34 electrons – selenium (Se) d) A metalloid in family number 15- arsenic (As) or antimony (Sb) e) An actinide – uranium (U) or any element in that row 6. Complete the following table. All atoms are neutral except for the second one. Element name # protons # electrons #neutrons Isotope symbol nickel 28 28 30 calcium 20 18 20 silver 47 47 61 phosphorus 15 15 16 7. Classify as ionic or molecular. Give the name of each compound: a) SeO – molecular – selenium monoxide b) CaI 2 – ionic- calcium iodide c) LiF – ionic- lithium fluoride d) NH 3 – molecular – nitrogen trihydride or ammonia 8. Provide the formula of the ionic compound formed between Mn 4+ and a selenium ion. MnSe 2...
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- Fall '10
- Chemistry, Chemical element, Chemical substance, Chemical compound