Science - Chemical Bonds
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What is a molecule?
A molecule is made up of two or more atoms joined together
Give an example of a molecule
Why are noble gases the most stable?
Because their outer shells have eight electrons
What is the octet rule?
When bonding occurs atoms try to have eight electrons in their outer shell
Explain the term ion
An ion is a charged atom or group of atoms
What is an ionic bond?
An ionic bond is formed when electrons are given or taken by atoms
Give examples of an ionic bond
What is a covalent bond?
A covalent bond is formed when atoms combine by sharing electrons so that each atom has a stable outer shell of electrons
Give examples of a covalent bond
List the properties of ionic compounds
They are solids
They have high melting and boiling points
They conduct electricity
State the properties of covalent compounds
They are liquid or gases
They have low melting and boiling points
They do not conduct electricity
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