carbon, because it has two electrons in its outermost p sublevel. Using the Periodic Table to Draw Lewis Dot Structures. The Period. Explanation: Lewis dot structure are the structures which tells us the number of valence electrons around the nucleus of an atom in a molecule. 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. 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. Calcium hydride (CaH2) CaH2. The number of dots equals the number of valence electrons in the atom. (Vertical colmns) gives the number of outer electrons. It reacts with water to form calcium hydroxide and phosphine, a flammable poisonous gas. 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?. (Horizontal rows)= the number of the shells The Group. lithium, because it is a group 1 element with two bonding electrons. To determine a Lewis structure, all you need is a Periodic Table. Calcium, because it is an alkaline earth metal in period 4. The Lewis dot diagram would have two dots. When you draw the Lewis structure for Calcium you'll put two 'dots' or valance electrons around the element symbol (Ca). HSDB 8095. If there is an excess of water this fire of phosphine will not normally ignite surrounding combustible material. Answer: The correct answer is: 'Carbon, because it is in group 14 and has four valence electrons'. The Lewis dot structure representing calcium phosphate is: Lewis Symbols. The PT is a map for the Lewis structure of every element. An atom's lewis dot structure has two dots. Note: Calcium is in Group 2 (sometimes called Group II or 2A). DTXSID60894886. 2. EINECS 232-189-2 magnesium, because it is a group 2 element with two valence electrons. Answers (2) Wilburt 30 June, 15:39. calcium, because it is an alkaline earth metal with two inner shell electrons. Calcium has two valence electrons. Take the two electrons away and it has no dots. ... For example, the Lewis electron dot diagram for calcium is simply. Each Group, or column, is indicated by a roman numeral which represents the number of valence electrons. Since it is in Group 2 it will have 2 valence 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. Write to me in PM, we will talk. The periodic table has all of the information needed to draw a Lewis dot structure. Phosphine will normally ignite spontaneously in contact with air. which of the following elements could it be, and why? 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