UNIT 1 TOPIC 4 Flashcards
What is an ionic bond?
a type of intramolecular bonding between metals and non-metals
What is a cation?
a positively charged atom that has lost electrons
What is an anion?
a negatively charged atom that has gained electrons
What are the 3 properties of an ionic compound?
brittle, hardness and liquid conductive
Why are ionic compounds brittle?
the diagonal 3D structure creates a strong bond, however, if misaligned the charges will repel each other thus easily breaking
Why are ionic compounds hard?
the diagonal 3D structure creates a strong bond that cannot easily be broken
Why are ionic compounds only conductive in liquid?
this is due to the structure, as to be conductive requires free moving electrons which are only present in its liquid state and not the solid as the structure is too strongly bonded to move
What is a polyatomic ion?
ion that contains one or more atoms
What is precipate?
an insoluble product made when substances in a solvent are mixed and swap partners causing a change in state from aq to s
What does SNAPE stand for?
water soluble elements
sodium, nitrate, ammonium, potassium and ethanoate
What is the structure of an ionic bond?
3D crystal lattice made of cations and anions
When are ionic compounds formed?
when metal atoms lose electrons and form a positively charged ion and non-metals gain electrons to form negatively charged ions
What charge do ionic compounds have?
zero charge
What is electrovalency?
charge of an ion
What is a spectator ion?
ion not involved in precipitate formation
