C2 Chemistry - properties of ionic compounds Flashcards
when does an ionic bond form?
when a metal reacts with a non metal
what are the two properties of ionic compounds?
explain why?
high melting and boiling points
-ionic bonds are strong, lots of energy to break them
conductive when liquid
-they can only conduct when their ions move freely, not when they are solid
what properties does graphite have? 3
insoluble in water
high melting point
conducts electricity
what are the characteristics of graphite (what does it look like?)
black and opaque
slippery
why is graphite slippery?
it contains layers of carbon atoms that move over each other easily cus there are only weak forces between them
what are diamonds properties? 5
hard colourless and clear high melting point insoluble in water does not conduct electricity
why do diamonds not conduct electricity?
they have no free electrons to move around freely
why do metals have high boiling and melting points?
their particles are help together by strong metallic bonds which makes them hard to break up, needs lots of energy
