What are the properties of ionic and molecular substances?
Physical Properties of Molecular Compounds
| Property | Ionic Compounds | Molecular Compounds |
|---|---|---|
| Physical state at room temperature | Solid | Gas, liquid, or solid |
| Water solubility | Usually high | Variable |
| Melting and boiling temperatures | Generally high | Generally low |
| Electrical conductivity | Good when molten or in solution | Poor |
What are the properties of ionic properties?
Properties Shared by Ionic Compounds
- They form crystals.
- They have high melting points and high boiling points.
- They have higher enthalpies of fusion and vaporization than molecular compounds.
- They’re hard and brittle.
- They conduct electricity when they are dissolved in water.
- They’re good insulators.
What are the differences in properties between ionic and molecular compounds?
Ionic compounds usually form hard crystalline solids with high melting points. Covalent molecular compounds, in contrast, consist of discrete molecules held together by weak intermolecular forces and can be gases, liquids, or solids at room temperature and pressure.
How do you label a molecular compound?
Molecular compounds are named with the first element first and then the second element by using the stem of the element name plus the suffix -ide. Numerical prefixes are used to specify the number of atoms in a molecule.
Which characteristics is a property of molecular substances?
The three main properties of a molecular substance include: low melting points, or a temperature that indicates when a solid substance changes to a liquid; and boiling points, or a temperature that indicates the point at which a liquid changes to a gas, or vapor; poor conductivity; and low solubility, which is a …
What are three physical properties of ionic compounds?
Physical properties of ionic compounds
- electrical conductivity. Ionic compounds conduct electricity when molten or dissolved in water because the ions can move and carry charge.
- water solubility. Most ionic compounds are soluble in water and form aqueous solutions.
What are the four properties of molecular compounds?
Properties of Covalent Molecular Compounds.
- Low melting points and boiling points.
- Low enthalpies of fusion and vaporization These properties are usually one or two orders of magnitude smaller than they are for ionic compounds.
- Soft or brittle solid forms.
- Poor electrical and thermal conductivity.
What are the 4 properties of ionic compounds?
PROPERTIES OF IONIC COMPOUNDS
- They are usually crystalline solids.
- They have high melting points and high boiling points.
- They are usually soluble in water but insoluble in organic solvents.
- They conduct electricity when dissolved in water or when melted.
Which two properties are more typical of molecular compounds than of ionic compounds?
1. They are gases or liquids at room temperature. 2. They have high melting points.
How are ionic compounds named?
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion. For example, KCl, an ionic compound that contains K+ and Cl- ions, is named potassium chloride.