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What is a bi-metal strip?

2 different metals fused together. The metals expand at different rates, so they fuse/bend.
*thermostats use these
- furnance is on when Hg is on the right side
- it's shut off when it's on the left side.

1

_______: 2 different metals fused together. The metals expand at different rates, so they fuse/bend.
*thermostats use these
- furnance is on when Hg is on the right side
- it's shut off when it's on the left side.

Bi-metal strip

2

BI- METAL STRIP: 2 different metals ______. The metals expand at different rates, so they fuse/bend.
*thermostats use these
- furnance is on when Hg is on the right side
- it's shut off when it's on the left side.

Fuse together

3

BI-METAL STRIP: 2 different metals FUSE TOGETHER. The metals expand at different rates, so they fuse/bend.
*_______use these
- furnance is on when Hg is on the ____
- it's shut off when it's on the ____

Thermostats
Right side
Left side

4

BI-METAL STRIP: 2 different metals fused together. The metals expand at different rates, so they _______
*thermostats use these
- furnance is on when Hg is on the right side
- it's shut off when it's on the left side.

Fuse/bend

5

________: don't exist unless they're ions because they have 1 extra electron.

Alkali metals

6

ALKALI METALS: don't exist unless they're _____ because they have 1 extra electron.

Ions

7

_______________
- electrodes
- Na+ give off quanta in yellow spectra : this is why they're yellow lights
- yellow street lights are better than white because the human eye sees yellow/green light best
-uses less electricity. Produces more light

Sodium vapor lamps

8

_______
Uses:
1.)medicine: LiCl (Lithium Chloride)
-used for mental/ bipolar/ manic symptoms.
How it works: Li+ replaces K+; Li+ does not transmit nerve signals as well/quickly as K+.
-patient compliance is essential
2.) aircraft bodies
-lithium/ aluminum alloys produce lightweight metals

Lithium

9

LITHIUM
Uses:
1.)_________: LiCl (Lithium Chloride)
-used for mental/ bipolar/ manic symptoms.
How it works: Li+ replaces K+; Li+ does not transmit nerve signals as well/quickly as K+.
-patient compliance is essential
2.) ______
-lithium/ aluminum alloys produce lightweight metals

Medicine
Aircraft bodies

10

LITHIUM
Uses:
1.)medicine: _______________
-used for ____/ bipolar/ manic symptoms.
How it works: Li+ replaces K+; Li+ does not transmit nerve signals as well/quickly as K+.
-patient compliance is essential
2.) ________
-lithium/ aluminum alloys produce _______

LiCl (Lithium Chloride)
Mental

Aircraft bodies
Lightweight metals

11

Coke and charcoal both include ______

Carbon

12

____:coal burned without oxygen

Coke

13

_______:wood burned without oxygen

Charcoal

14

______:large chunks of iron.
Brittle cracks easily

Pig iron

15

____:react with and remove impurities

CaCO3

16

Iron----> __

Steel

17

Steel= _____+____

Iron
Carbon

18

Steel= iron+carbon
-the more _____ the harder the steel is
- 0.2% carbon = mild/soft steel
Uses: I-beams, drill bits

Carbon

19

Steel= iron+carbon
-the more carbon the harder the steel is
- 0.2% carbon = mild/soft steel
Uses: _________,_______

I-beams
Drill bits

20

______: a mixture of 2 or more metals melted together

Alloy

21

________: (softening) - heated up; cooled slowly

Annealing

22

____: cold working/cold rolling.
-pound steel (cold) into a new shape.
-put stress into steel
-HEAT TREATING: Heat up and cool rapidly
-SURFACE HARDENING: pure carbon onto surface of steel (cause hardening)

Hardening

23

HARDENING: cold working/cold rolling.
-pound steel (cold) into a new shape.
-put stress into steel
- ___________:Heat up and cool rapidly
-____________:pure carbon onto surface of steel (cause hardening)

Heat treating
Surface hardening

24

______: copper + zinc

Brass

25

_____: copper + tin

Bronze

26

Brass: ______+______

Copper
Zinc

27

bronze: ____+ _____

Copper
Tin

28

What are the 3 precious metals?

Silver
Gold
Platinum

29

What are the precious metals:silver, gold, platinum.
Characteristics?

Shiny
Durable
Malleable
Rare