Since electrons spend more time with the oxygen atom, it carries a partial negative charge. What is another name for a covalent compound? A covalent bond, also called a molecular bond, is a chemical bond that involves the sharing of electron pairs between atoms. These electron pairs are known as shared pairs or bonding pairs, and the stable balance of attractive and repulsive forces between atoms, when they share electrons, is known as covalent bonding.
What type of element is always listed first? When writing a formula or naming a compound: a. For Type I and Type II compounds, first list the metal then the nonmetal; b For Type III compounds always list the electropositive species first the element furthest left in the periodic table and then the electronegative species.
Why is oxygen a diatomic molecule? Oxygen generally exists as a diatomic molecule in the atmosphere when it is not combined with any other element. It forms the molecule O2 because in that configuration, it has its lowest energy level when uncombined.
All substances tend to go to the lowest energy level possible. Oxygen has 6 valence electrons. What is an example of a molecular compound? Molecular compounds are inorganic compounds that take the form of discrete molecules. Examples include such familiar substances as water H2O and carbon dioxide CO2. In a carbon dioxide molecule, there are two of these bonds, each occurring between the carbon atom and one of the two oxygen atoms. Here are the rules for naming binary covalent compounds.
A binary compound is one that consists of only two elements. The names are called systematic names. Choosing the order of elements based on their position on the periodic table is the shorthand method of selecting elements based on their electronegativity. The element with the lower electronegativity or higher electropositivity is the cation or first part of the compounds, while the element with the higher electronegativity is the anion or second part of the compound.
If you have trouble determining the cation and anion, you can consult a list of element electronegativity values. Because it is so unreactive, sulfur hexafluoride is used as a spark suppressant in electrical devices such as transformers. For some simple covalent compounds, we use common names rather than systematic names.
We have already encountered these compounds, but we list them here explicitly:. Methane is the simplest organic compound.
Organic compounds are compounds with carbon atoms and are named by a separate nomenclature system that we will introduce in Section 4. What is the name of the simplest organic compound? What would its name be if it followed the nomenclature for binary covalent compounds?
Learning Objectives Identify covalent and ionic compounds. Determine the chemical formula of a simple covalent compound from its name. Determine the name of a simple covalent compound from its chemical formula. Characteristics of Covalent Molecular Compounds Compounds that contain covalent bonds also called molecular compounds exhibit different physical properties than ionic compounds.
Answer b Because sodium is a metal and we recognize the formula for the phosphate ion, we know that this compound is ionic. Concept Review Exercises How do you recognize a covalent compound?
What are the rules for writing the molecular formula of a simple covalent compound? What are the rules for naming a simple covalent compound? Answers A covalent compound is usually composed of two or more nonmetal elements.
The "i" at the end of the prefixes "di-" and "tri-" are never dropped. Show all questions. Nomenclature of Binary Covalent Compounds Select your answer by clicking on the appropriate button buttons are labeled with a question mark, "?
What is the correct molecular formula for the compound, antimony trichloride? What is the correct molecular formula for the compound, boron trifluoride? What is the correct molecular formula for the compound, dinitrogen dichloride? What is the correct molecular formula for the compound, chlorine monofluoride? What is the correct molecular formula for the compound, dichlorine monoxide?
What is the correct molecular formula for the compound, disulfur decafluoride?
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