Definition
Molecule of element: Electrically neutral particle made up of 2 or more atoms of the same element, which are chemically combined through sharing of electrons
Definition
Molecule of Compound: Electrically neutral particle made up of 2 or more atoms of different elements which are chemically combined through sharing of electrons #ChemistryDefinitions
Definition
Valency refers to the number of electrons that must be lost, gained or shared in order for the atom to attain noble gas configuration. #ChemistryDefinitions
Definition
Covelant Bond is the strong electrostatic forces of attraction between 2 positively charged protons in the nuclei of the 2 atoms and the negatively charged electrons which are shared between 2 atoms. #ChemistryDefinitions
Covalent bond is formed between atoms only* → not ions or molecules occur between non metals.
Triple bond → ≡ → formed when total 6 valence electrons are shared. Double bond → = → formed when total 4 valence electrons are shared Single bond → - → formed when total 2 valence electrons are shared.
In covalent bonding - since electrons are shared so closely that the shell overlaps - the bond between atoms is hard to break.
covalent bonding → can occur as long as electrons can be shared between atoms.
Covalent Molecules
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covalent molecules can be made from atoms of same or different elements
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Covalent molecules → mostly simple molecules
- means that they have a countable number of atoms in a fixed ratio
Some covalent substances → exist as giant molecules which have uncountable number of atoms in each molecule.
common covalent substances can be found here: Common Substances
Properties of Covalent Substances
Properties of Covalent Compounds