Bonding & Properties of Matter- Covalent Bonding Flashcards
Covalent bonds are formed when non-metal atoms share _____ of electrons.
Covalent bonds are formed when non-metal atoms share pairs of electrons.
Covalent bonds are _______.
Covalent bonds are strong.
Many covalent compounds consist of _____, ______ __________ e.g., oxygen, chlorine and water.
Many covalent compounds consist of small, simple molecules e.g., oxygen, chlorine and water.
They are usually _____ or _______ with low melting and boiling points.
They are usually gases or liquids with low melting and boiling points.
Small covalent molecules have ____ intermolecular forces between the molecules.
Small covalent molecules have weak intermolecular forces between the molecules.
When these substances are heated it is the ________________ ______ that break not the ________ _____.
When these substances are heated it is the intermolecular forces that break not the covalent bonds.
Simple covalent molecules do not _______ ___________ because the molecules do not have an overall charge.
Simple covalent molecules do not conduct electricity because the molecules do not have an overall charge.
Polymers are very _____ molecules held together by ______ covalent bonds.
Polymers are very large molecules held together by strong covalent bonds.
Some covalently bonded substances have giant structures eg _______ ________, ________ and ________.
Some covalently bonded substances have giant structures eg silicon dioxide , diamond and graphite.
when showing chemical bonding why is only the outer energy level shown
its the only one involved in chemical bonding
what is a shared pair of electrons called
a covalent bond
true or false?
you can have double covalent bond
true
in a stick diagram how is a double covalent bond shown
as two lines
in a covalent molecule how are the atoms held together
by strong covalent bonds
why do small covalent molecules have low boiling and melting points
they have weak intermolecular forces which require little energy to overcome and break
