C2 Flashcards
Name the force that holds ions together in an ionic bond
Electrostatic forces
What do dot and cross diagrams show
Charge of ions, arrangement of electrons in atom or ion and which atoms the electrons in an ion originally come from
What are the limitations of a dot and cross diagram
Don’t show the structure of the compound or correctly represent the sizes of the ions
Name the structure that ionic compounds have
Giant ionic lattice
What particles are present in sodium chloride
Positive sodium ions and negative chlorine ions
How are the particles arranged in sodium chloride
Giant ionic lattice
Why does sodium chloride have a high melting point
You have to overcome the very strong electrostatic forces which requires lots of energy
Why does potassium chloride have a high boiling point
Has a giant structure with strong ionic bonds in order to boil, these bonds need to be broken which takes a or of energy
How do two atoms come together to form a single covalent bond
They share a pair of electrons
What must you have in order to have a covalent bond
Non-metals
What is a con of using displayed formula or a dot and cross diagram
Doesn’t show the 3D structure
What is a con of using a 3D model
Quickly becomes complicated for bigger molecules
