Chapter 24- Metals And Non-Metals Flashcards Preview

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Flashcards in Chapter 24- Metals And Non-Metals Deck (15)
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1

Def, of sonorous

Makes a clanging sound when hit

2

Def, of malleable

Shareable

3

Properties of metals

-high density
-conduct electricity
-malleable
-shiny
-sonorous
-ductile
-hard and strong
-conduct heat

4

Exceptions to the properties of metal

Alkali metals-> soft w/ low densities

Mercury-> liquid at room temperature

5

Experiment to prove:
Metals have high melting points

Place nail over Bunsen burner-> doesn't melt

6

Experiment to prove:
Metals are lustrous but dull due to oxidation

Rub magnesium ribbon w/ sandpaper -> becomes shiny

7

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

8

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

9

Experiment to prove:
Metals are sonorous

Strike metals against each other

->

Make a ringing sound

10

Properties of non-metals

-liquids/gasses
-opposite properties to metals
-> low melting points
-> brittle in solid state
-> poor heat conductors
-> poor electricity conductors

11

Exception to non-metals

Carbon in form of graphite is a good conductor of electricity

Carbon in form of diamonds are exceptionally hard

12

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

13

To prevent rusting

-painting
-coat in plastic
-galvanising (zinc)
-tin plating
-greasing

14

Give order of reactivity in metals in a named acid

-dilute HCL acid
-CATS MAKE ZEBRAS CRY
-Calcium Magnesium Zinc Copper

15

Def. of ductile

Can be stretched into a wire