4.5 The covalent bond
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Why don’t atoms of non-metals give up electrons to gain a full-shell?
Atoms of non-metals don’t give up electrons to gain a full-shell, because they would have to lose so many. It would take too much energy to overcome the pull of the positive nucleus.
What is needed when two non-metals react together?
When two non-metal atoms react together, both need to gain electrons to achieve stable outer shells.
What is a covalent bond?
A covalent bond is formed by the equal sharing of electrons from both participating atoms.
What is a molecule?
A molecule is a group of atoms held together by covalent bonds.
What is a single bond?
The bond between atoms that share only one pair of electrons is called a single covalent bond.
What is a double bond?
The bond between atoms that share two pairs of electons is called a double bond.
What is a triple bond?
The bond between atoms that share three pairs of electons is called a triple bond.