Answer: The correct answer is: 'Carbon, because it is in group 14 and has four valence electrons'. Since it is in Group 2 it will have 2 valence electrons. It reacts with water to form calcium hydroxide and phosphine, a flammable poisonous gas. The Period. HSDB 8095. Explanation: Lewis dot structure are the structures which tells us the number of valence electrons around the nucleus of an atom in a molecule. If there is an excess of water this fire of phosphine will not normally ignite surrounding combustible material. carbon, because it has two electrons in its outermost p sublevel. Using the Periodic Table to Draw Lewis Dot Structures. Calcium hydride (CaH2) CaH2. 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. 2. EINECS 232-189-2 (Vertical colmns) gives the number of outer electrons. (Horizontal rows)= the number of the shells The Group. The Lewis dot structure representing calcium phosphate is: Lewis Symbols. 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?. The Lewis dot diagram would have two dots. which of the following elements could it be, and why? lithium, because it is a group 1 element with two bonding electrons. Write to me in PM, we will talk. DTXSID60894886. A Lewis Dot Structure can be made for a single atom, a covalent compound, or a polyatomic ion. Each Group, or column, is indicated by a roman numeral which represents the number of valence electrons. The reactivity of calcium, valence electron and what is the structure after calcium react with other elements like calcium chloride CaCl2 Calcium has two valence electrons. The number of dots equals the number of valence electrons in the atom. The PT is a map for the Lewis structure of every element. An atom's lewis dot structure has two dots. The periodic table has all of the information needed to draw a Lewis dot structure. 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. magnesium, because it is a group 2 element with two valence electrons. calcium, because it is an alkaline earth metal with two inner shell electrons. To determine a Lewis structure, all you need is a Periodic Table. ... For example, the Lewis electron dot diagram for calcium is simply. Answers (2) Wilburt 30 June, 15:39. When you draw the Lewis structure for Calcium you'll put two 'dots' or valance electrons around the element symbol (Ca). Calcium, because it is an alkaline earth metal in period 4. Phosphine will normally ignite spontaneously in contact with air. 0. A Lewis electron dot diagram (or electron dot diagram or a Lewis diagram or a Lewis structure) is a representation of the valence electrons of an atom that uses dots around the symbol of the element. 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