To do so, two Bromine atoms combine with one another to seek the missing valence shell electron. The need is to fill up the vacant electron spot and attain stability. In the case of Dibromine, or Br2, both the Bromine atoms have 7 electrons in their outermost valence shell. While these properties assert the various uses a compound would have in the real world, it is also noteworthy to understand the different categories of molecular models that are used to classify the plethora of natural and artificial compounds. The depiction of atoms in 3D also gives an explanation of the physical and chemical properties of a compound, such as its color, smell, shape, magnetism, reactivity, potency, and resistance among others. Molecular Geometry also helps one to understand the actual occurrence of the atoms of a compound in 3-dimensional space along with the bond angle and the bond length between two electrons. The need to understand the reason behind why a compound looks or feels or reacts the way it does, lead to the concept of Molecular Geometry.Īdding to the findings of the Lewis structure, Molecular Geometry is the study of different elements by drawing a 3-dimensional figure of the underlying atoms. This forms the Lewis structure of Dibromine, which is finally represented as follows: Since both the atoms belong to the same element, the bond angle here is 180 degrees, which means that both the atoms are exactly opposite to each other. Step 5: Next step is to mention the name of each atom, both of which are connected through a straight line and lie adjacent to each other. Step 4: The resultant Bromine atoms have 8 outer shell electrons each thus satisfying the octet rule.īoth the Bromine atoms enter a sharing system to fill their remaining slot of 1 missing electron and therefore achieve stability. This way, we have exhausted all available valence shell electrons. Step 3: Now once the structure of the atoms has been drawn, next is to mention the number of possible valence shell electrons with respect to the valence shell electrons in the case of Br2, which is 14. The 2 atoms are connected through a chemical bond, represented by a straight line. Step 2: Next, we need to draw 2 Bromine atoms adjacent to each other. In the case of Dibromine, the combined number of valence shell electrons increases to become 14 for Br2. As we know that Bromine lies in the same group as Chlorine and Fluorine, Bromine has 7 electrons in its valence shell. Step 1: The first task is to count the number of electrons in the valence shell of the atom. below are the steps to draw the lewis diagram of the Br2 molecule. It also does not reflect upon the molecular design, geometry, or the 3-dimensional representation of atoms. While the Lewis Structure provides an idea about the physical attributes of the compound, its representation is limited since it is a 2-dimensional model. Lewis Structure also gives an insight into the electron configuration of an atom and the way in which it can aim to achieve stability through equilibrium. The idea behind drawing the Lewis structure of the atom of a compound is to get an understanding of the chemical and physical properties the compound would possess. The structure uses dots and lines to depict electrons and the bonds between 2 electrons, respectively. Now, let us move to study the lewis structure of the Br2 molecule in detail.Ī compound’s Lewis Structure depicts the arrangement of its underlying valence shell electrons. Just like the other halogens, its shortcoming of 1 electron in forming an octet makes it a potent oxidizing agent, and is, therefore, reacts with various elements to complete its need of 1 electron to form a full octet configuration in the outermost shell and attain stability.ĭibromine is formed when 2 atoms of Bromine combine to attain stability. In fact, it is available in the form of a soluble colorless halide crystalline mineral salt, like table salt.Įven though it is rarely available in the Earth’s crust, it is accumulated in the oceans due to the high solubility of the Bromide ion (Br-).īromine has 7 electrons in its outermost shell which acts as its valence electrons. The elemental Bromide is extremely reactive and therefore does not materialize freely in nature. Its atomic number is 35 and the atomic mass is 79.90 u.īromine is the third lightest of the halogens and can be found in the form of both a smoldering reddish-brown liquid at normal room temperature and a reddish-brown gas.īeing in the same group as Fluorine, Chlorine, and Iodine, it exhibits similar chemical properties. These structures can generally be predicted, when A is a nonmetal, using the "valence-shell electron-pair repulsion model (VSEPR) discussed in the next section.Bromine or Br is a Halogen found in the Group 7A of the periodic table.
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