Molecular Compounds

Compounds that are composed of only non-metals or semi-metals with non-metals will display covalent bonding and will be classified as molecular compounds. Nitrogen monoxide (NO) will be a covalently bound molecule (two non-metals) and silicon dioxide (SiO₂) will also be a covalently bound molecule (a semi-metal and a non-metal). The basic unit of molecular compounds are called molecules.

Example 1

Provide the classification (i.e. atomic element, molecular element, molecular compound, or ionic compound) of each substance.

1. Fe
2. PCl₃
3. LiBr
4. P₄
5. oxygen gas

SOLUTION

1. Fe, iron is an element that is represented with no subscript, so it is an atomic element.
2. PCl₃ is made up of two nonmetals, so it is a molecular compound.
3. LiBr is made up of lithium, a metal and bromine a nonmetal, so it is an ionic compound.
4. P₄ is a substance that is made up of four atoms of the same element, so it is a molecular element.
5. The formula for oxygen gas is O₂ so it is a molecular element.

مواضيع ذات صلة

تسمية المركبات الجزيئية Molecular Compounds

تسمية المركبات الأيونية Ionic Compounds

تسمية المركبات Naming Compounds

صيغ المركبات الأيونية Formula of Ionic Compounds

الصيغ الأولية Empirical Formulas

الصيغ الجزيئية Molecular Formulas

الأيونات Ions

الجزيئات Molecules

الجدول الدوري The Periodic Table

العدد الذري وعدد الكتلة والنظائر Atomic Number, Mass Number and Isotopes

النيوترون The Neutron

البروتون والنواة The Proton and the Nucleus