Unit: Chemistry Lesson 3: Metals Essential Questions: 1.) What are the properties of metals? 2.) How...
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Transcript of Unit: Chemistry Lesson 3: Metals Essential Questions: 1.) What are the properties of metals? 2.) How...
Unit: Chemistry
Lesson 3: Metals
Essential Questions:
1.) What are the properties of metals?
2.) How are metals classified?
MetalsMany of the objects around you contain metals. What are the objects that will set off the metal detector?
Elements that are good Metals
conductors of electric current
and heat. They tend to be shiny
and bendable.
The majority of elements in the periodic table are metals.
Physical PropertiesShininess and Lusterreflectivity
Ability to be rolled into Malleableflat sheets or shapes
Ability to be drawn into Ductilelong wires
Ability of an object Thermal conductivityto transfer heat
Ability of an object Electrical conductivityto carry electriccurrent
Chemical Properties
The ease and speed Reactivity
in which an element
combines or reacts
with another substance
Sodium reacts strongly with water.
The deterioration of Corrosion
metal due to a
chemical reaction
When iron gates react with oxygen in the air they form rust.
How are metals classified?Alkali Metals Group 1 The most reactive Found only in
compounds Melt at low
temperaturesElements such as lithium, copper, and potassium give fireworks their colors.
Alkali Metals
Alkaline Earth Metals Group 2 Harder and denser Melt at higher temperatures Not as reactive
Calcium compounds are an essential part of teeth and bones.
Alkaline Earth Metals
Transition Metals Groups 3-12 Good conductors of heat and electric
current Malleable Less reactive than metals
The gold film on an astronaut's visor protects from the sun.
Transition Metals
Metals in Mixed Groups Only some elements in Groups 13-16
are metals.
Aluminum
Lead
Mixed Metals
Lanthanides and Actinides Found in the two rows below the main
table. Row 1- Lanthanides (used to make
laser lights) Row 2- Actinides (many are made in
labs)
Lanthanides are used to produce laser lights in range finders. It uses a laser beam to determine distance.
Lanthanides
Actinides
Transuranium Elements Elements that follow uranium in the
periodic table. Particle accelerators are used to create
these elements.
Particle accelerators are used to make elements.
Transuranium Elements