The periodic table has all of the information needed to draw a Lewis dot structure. To determine a Lewis structure, all you need is a Periodic Table. lithium, because it is a group 1 element with two bonding electrons. The PT is a map for the Lewis structure of every element. Practice 62 In the Lewis electron-dot diagram, the dots represent 1) valence 2) 3) 4) Practice 66 Which Lewis electron-dot diagram represents calcium oxide?. magnesium, because it is a group 2 element with two valence electrons. An atom's lewis dot structure has two dots. 0. (Vertical colmns) gives the number of outer electrons. Also, based on the sourced electronegativity chart, the difference in electronegativity is 0.9 (Ca is 1.0 and Si 1.9), so it would be polar covalent. carbon, because it has two electrons in its outermost p sublevel. Take the two electrons away and it has no dots. When you draw the Lewis structure for Calcium you'll put two 'dots' or valance electrons around the element symbol (Ca). The reactivity of calcium, valence electron and what is the structure after calcium react with other elements like calcium chloride CaCl2 The Lewis dot diagram would have two dots. Phosphine will normally ignite spontaneously in contact with air. DTXSID60894886. Since it is in Group 2 it will have 2 valence electrons. If there is an excess of water this fire of phosphine will not normally ignite surrounding combustible material. Using the Periodic Table to Draw Lewis Dot Structures. Or since the outermost energy level of Ca2+ is now the 3s and 3p which are all filled, you could draw it with eight dots, but I wouldn't. Explanation: Lewis dot structure are the structures which tells us the number of valence electrons around the nucleus of an atom in a molecule. Answer: The correct answer is: 'Carbon, because it is in group 14 and has four valence electrons'. Answers (2) Wilburt 30 June, 15:39. Note: Calcium is in Group 2 (sometimes called Group II or 2A). The Period. HSDB 8095. The Lewis dot structure representing calcium phosphate is: Lewis Symbols. It reacts with water to form calcium hydroxide and phosphine, a flammable poisonous gas. Calcium, because it is an alkaline earth metal in period 4. EINECS 232-189-2 Each Group, or column, is indicated by a roman numeral which represents the number of valence electrons. Write to me in PM, we will talk. Calcium has two valence electrons. ... For example, the Lewis electron dot diagram for calcium is simply. which of the following elements could it be, and why? Calcium hydride (CaH2) CaH2. The number of dots equals the number of valence electrons in the atom. Calcium phosphide appears as red-brown crystals to gray granular lumps. 2. A Lewis Dot Structure can be made for a single atom, a covalent compound, or a polyatomic ion. (Horizontal rows)= the number of the shells The Group. calcium, because it is an alkaline earth metal with two inner shell electrons. 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