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2.3 Types of substances and conductivity
2.4 types of substances and conductivity
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Scheikunde
Middelbare school
vwo
Leerjaar 3
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2.4 types of substances and conductivity
Slide 1 - Diapositive
Molecules
A molecule is the smallest particle of a substance with the same properties of that substance.
The
molecule model
shows what a molecule looks like
A few nanometers (1nm= 0.000000001mm)
Slide 2 - Diapositive
The molecule model of water
Slide 3 - Diapositive
Molecules in different fases
Slide 4 - Diapositive
Types of substances
Slide 5 - Diapositive
Different atoms
Slide 6 - Diapositive
types of substances
Metals
Molecular substances
Salts
Slide 7 - Diapositive
Metals
A substance consisting only of metal atoms
Shiny surface
formable
conduct heat
Conduct electricity in solid and liquid phase
Slide 8 - Diapositive
Corrosion sensitivity
A process in which a metal reacts with oxygen and water.
With iron it's called rusting.
Some types of metals are more sensitive for corrosion than others
Slide 9 - Diapositive
Precious metals
Metals that do not react with oxygen and water
Gold
Silver
Platinum
Slide 10 - Diapositive
semi-precious metals
Metals that react with difficulty with oxygen and water
Mercury
Copper
Slide 11 - Diapositive
Base metals
metals that react with water and oxygen
Iron
Zinc
Slide 12 - Diapositive
Very base metals
Metals that react very violently with oxygen and water
Potassium
Sodium
Magnesium
Slide 13 - Diapositive
Alloy
Two or more types of metal atoms combined is called an alloy.
Used to make a metal stronger
Slide 14 - Diapositive
In which fase can metals conduct electricity?
A
Gas and liquid
B
dissolved and gas
C
liquid and dissolved
D
solid and liquid
Slide 15 - Quiz
What are base metals?
A
Metals that do not react with oxygen and water
B
Metals that react with difficulty with oxygen and water
C
Metals that react easily with water and oxygen
D
Metals that react very violently with oxygen and water
Slide 16 - Quiz
Molecular substances
Connections between non-metal atoms
Few common features
do not conduct electricity
Molecules
Slide 17 - Diapositive
Salts
Decomposable substances consisting of metal atoms and non-metal atoms.
Strong but fragile
Do not conduct electricity as a solid
In liquid or dissolved phase, salts can conduct electricity because the particles then move freely
Slide 18 - Diapositive
Which types of atoms is a molecular substance made of?
A
non-metalatoms
B
metalatoms
C
non-metalatoms and metalatoms
Slide 19 - Quiz
In which phase can a salt conduct electricity?
A
Solid and liquid
B
gas and solid
C
dissolved and gas
D
dissolved and liquid
Slide 20 - Quiz
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