A covalent bond is a bond that is formed between two nonmetals. An ionic bond is formed between a nonmetal and a metal. Nonmetals tend to be stronger than the metals, meaning they can easily take valence electrons from a metal. Molecular compounds also have a very low boiling point, while ionic compounds have a high boiling point. Ionic bonds only occur when there is a large difference in electronegativity. Molecular bonds happen when their electronegativity is close. Single covalent bonds are called sigma bonds, where only one set of valence electrons is shared (Course.LumenLearning)We learned in our lab, models of molecular compounds, that there can also be several different shapes of molecular compounds. You can have linear, tetrahedral, bent, and pyramidal. You can also have a polar bond, or a nonpolar bond. Certain molecules will also repel one another, making them polar.(MyLabNotebook.) How do electrons affect the shape of the molecule? Electrons affect the shape depending on how they are arranged. Electrons are negative, so they will repel one another. This will cause a certain shape to occur. You can get a bent shape when only two bonds occur and one electron is left …show more content…
To find a molecular formula of a compound you need the molar mass and the percent element makeup of that compound. After you find that, you can then begin to determine the formula of the compound.
How do chemical reactions obey the law of conservation of mass? When a reaction occurs, you can not have less or more of one element. If you have more mass in the product than the reactant, that means there was a contamination in the lab. If you have less, something must have been accidentally dumped during the process, or you recorded the masses wrong. Either way, according to the law of conservation of mass, mass is neither created or destroyed. It must remain the same. (socratic.org)
How can you predict the products of a chemical reaction? You can write a balanced chemical equation. A balanced chemical shows how the reactants react in order to become the products on the other side. We did several worksheets involving balancing equations and determining the type of reaction. There are five different types of reactions. There is synthesis, which is a combination of two or more compounds. Another type is combustion, which involves the creation of water, carbon monoxide, and carbon dioxide. The next two types are called single and double replacement reactions. These involve one or two elements replacing another element in the reaction in order to create a new compound. The last type is decomposition. This involves