Chapter 24- Metals And Non-Metals Flashcards
Def, of sonorous
Makes a clanging sound when hit
Def, of malleable
Shareable
Properties of metals
- high density
- conduct electricity
- malleable
- shiny
- sonorous
- ductile
- hard and strong
- conduct heat
Exceptions to the properties of metal
Alkali metals-> soft w/ low densities
Mercury-> liquid at room temperature
Experiment to prove:
Metals have high melting points
Place nail over Bunsen burner-> doesn’t melt
Experiment to prove:
Metals are lustrous but dull due to oxidation
Rub magnesium ribbon w/ sandpaper -> becomes shiny
Experiment to prove:
Metals conduct heat at different speeds
Black box with boiling water in it, four rods of brass, iron, aluminium, and copper, wax on end with thumb tacks
-> thumb tack will fall off one first
Experiment to prove:
Metals conduct electricity
Build a circuit with a battery, bulb and crocodile clips,
Place metal in between clips
->
Circuit will be complete and will light bulb
Experiment to prove:
Metals are sonorous
Strike metals against each other
->
Make a ringing sound
Properties of non-metals
- liquids/gasses
- opposite properties to metals
- > low melting points
- > brittle in solid state
- > poor heat conductors
- > poor electricity conductors
Exception to non-metals
Carbon in form of graphite is a good conductor of electricity
Carbon in form of diamonds are exceptionally hard
Alloy (def. and examples)
- Mixture of metals
- sometimes stronger than element
- Brass= copper+tin -> musical instruments
- Steel= iron +carbon -> building reinforcement
- Stainless Steel= iron+chromium+nickel-> knives, sinks
To prevent rusting
- painting
- coat in plastic
- galvanising (zinc)
- tin plating
- greasing
Give order of reactivity in metals in a named acid
- dilute HCL acid
- CATS MAKE ZEBRAS CRY
- Calcium Magnesium Zinc Copper
Def. of ductile
Can be stretched into a wire
