Covalent bonding Flashcards
What is a covalent bond?
A covalent bond is a shared pair of electrons between 2 non-metal atoms.
Why do the noble gases not form many compounds?
Because their arrangement of electrons is very stable as they have full shells of electrons.
How do atoms form a covalent bond
Non-metal atoms form a covalent bond by colliding with enough energy until their outer electron shells overlap, if two non-metal atoms collided with not enough energy then their outer electron shells would repel each other.
What are the diatomic elements?
Hydrogen, nitrogen, Oxygen, Fluorine, Chlorine, Bromine and Iodine. These elements are always found in pairs in nature.
How are the atoms held together?
When the outer electron shells overlap, the unpaired outer electron/s of one atom becomes attracted to the nucleus of the other atom, The atoms are held together by the attraction between the shared electrons and their nuclei.
What are the most common diatomic elements?
Oxygen and Nitrogen which make up over 99of the air that we breath.
What are the state symbols?
(S) Solid, (l) liquid, (g) gas or (aq) dissolved in water.
Prefixes?
Mono means 1, Di means 2, Tri means 3, Tetra means 4, and penta means 5.
What is a molecule?
A molecule is when two or more atoms combine.
What is a compound?
A compound is made up of 2 or more types of atom.
