A covalent bond is a shared pair of electrons. Covalent bonding results in the formation of molecules. Simple molecular substances have low melting and boiling points, and do not conduct electricity.
Covalent bonds are usually formed between which type of atom?
Metal and metal
Metal and non-metal
Non-metal and non-metal
How are electrons arranged in a covalent bond?
Pairs of electrons are shared
Electrons are transferred between atoms
Electrons form part of a sea of electrons
What does a displayed formula not show?
Which atoms are bonded to which
The angles of the covalent bonds
Which atoms are in the molecule
How many circles should be drawn in the dot and cross diagram for methane, CH4?
How many electrons should be drawn in an electron shell of a hydrogen atom?
How many electrons should be drawn in the outer shell of a chlorine atom?
Nitrogen has five outer electrons. How many hydrogen atoms can it form covalent bonds with?
How many electrons form a covalent double bond?
Which physical property is typical of a simple molecular substance?
Low boiling point
High melting point
Why do some simple molecular substances have higher boiling points than others?
They have weaker intermolecular forces
They are denser
They have stronger intermolecular forces