Uploaded byOhMiss
Molecular Compounds
Molecular compounds are formed when two or more different non-metal atoms combine via covalent bonds, sharing electron pairs. Examples include water, which is made of two hydrogen atoms bonded to one oxygen atom. Molecular compounds have properties like being soft and having low melting points. They are named systematically with the first element, the second as an "-ide", and prefixes to indicate atom amounts, like dinitrogen monoxide for N2O.
More Related Content
Molecular Compounds
- 1. Compounds Part two: Molecularcompounds
- 2. Molecular Compounds • A molecule is a combination of two or more atoms held together by covalent bonds • A covalent bond occurs between the atoms of non- metals in which the two atoms share a pair of electrons
- 3. Molecular Elements • A molecular element is when two or more atoms of the same element are joined by covalent bonds • A diatomic molecule is a molecule that is made from two atoms e.g.) the element chlorine is a diatomic molecule (Cl2)
- 4. Molecular Compounds • When atoms of two or more different non-metals combine, a pure substance known as a molecular compound is formed
- 5. Molecular Compounds • As with molecular elements, the atoms in molecular compounds are joined together by covalent bonds • In each bond, the atoms share a single pair of electrons.
- 6. Molecular Compounds • For example, water is a molecular compound with two covalent bonds • Each hydrogen atom shares one pair of electrons with an oxygen atom
- 7. Properties of Molecular Compounds • soft • low melting point • solutions do not conduct electricity
- 8. Naming Molecular Compounds For compounds that do not contain hydrogen: 1. Name the first element 2. Name the second element and change the ending to “-ide” 3. add prefixes to indicate the number of each atom
- 9. Naming Molecular Compounds • The prefix “mono” is not used when there is only one atom of the first element • When “mono” is being added to oxygen, the last “o” is dropped (e.g. “monoxide” not “monooxide”)
- 10. Naming Molecular Compounds Example 1: N2O • Name the first element: nitrogen • Name the second element using “-ide”: oxide • Add prefixes: dinitrogen monixide
- 11. Naming Molecular Compounds Example 2: PBr3 • Name the first element: phosphorous • Name the second element using “-ide”: bromide • Add prefixes: phosphorous tribromide
- 12. Naming Molecular Compounds • Hydrogen is unique in many ways, and this is reflected in the naming systems • Many compounds containing hydrogen have been given simpler names • For example, dihydrogen monoxide (H2O) is simply called “water”
- 13. Naming Molecular Compounds