Lewis Structures for Diatomic Gas Molecules скачать в хорошем качестве

Lewis Structures for Diatomic Gas Molecules

To write the Lewis structure for diatomic gases it is helpful to know the he seven major diatomic elements in chemistry: H2, N2, F2, O2, I2, Cl2, and Br2. A simple way to remember them is with the phrase “Have No Fear Of Ice Cold Beer” where the first letter in each word relates to H2, N2, F2, O2, I2, Cl2, and Br2. These seven diatomic gases are reactive and you will see them quiet frequently in chemistry. For example, for the equation: Mg + O2 = MgO You can see the Oxygen is not written as just “O” in the reactants. Instead, because it is one of the seven diatomic gases it is written as “O2”. When we have something like MgO, because the two elements are bonded it can be just “O”. The diatomic gases are only for when the elements are by themselves. ----Lewis Resources---- • Lewis Structures Made Simple:    • How to Draw Lewis Structures: Five Easy Steps   • More practice:    • Lewis Dot Structure Practice Problems (wit...   • Counting Valence Electrons:    • Finding the Number of Valence Electrons fo...   • Calculating Formal Charge:    • Formal Charges: Calculating Formal Charge   • Exceptions to the Octet Rule:    • Exceptions to the Octet Rule   ---Steps to Write Lewis Structure for compounds, like the diatomic gases: 1. Find the total valence electrons for the gas molecule. 2. Put two electrons between atoms to form a chemical bond. 3. Complete octets on outside atoms. 4. If central atom does not have an octet, move electrons from outer atoms to form double or triple bonds. Memorizing the seven common diatomic gases is essential when writing the formulas for compounds in word equations. Often you'll be given problems like: Methane + Oxygen gas reacts to form Carbon dioxide and Water Here Oxygen gas is the diatomic gas O2. The equation is: CH4 + O2 = CO2 + H2O Another example is: Nitrogen gas plus Hydrogen gas forms Ammonia. The equation is N2 + H2 = NH3. Without knowing the seven diatomic gases you will had difficulty with these types of problems.