3.2 Metals

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 3

Metals

Paragraph 3.2

Learning goals

At the end of the lesson you can:

• State six properties of metals.
• Describe what an alloy is.
• Derive properties from the nobility of a metal.

What properties of metals do know?

Properties of metals

• Conduct heat and electricity
• Can be shaped easily
• Metals in liquid phase mix easily with other metals
• Most metals have high melting point
• Most metals react with oxygen and water
• Metals have a shiny surface

Alloy

• Mixture of molten metals
• Bronze (alloy of cupper and tin)
  
  

Nobility

Noble metals (do not react with water and oxygen

Base metals (reacts easily with water and oxygen)

Alkali metals (reacts violently with water and oxygen)

Earth alkaline metals (reactivity between base and alkali metals) 

Noble metals ..?

1. Rust
2. Are cheap
3. Don't shine
4. Don't rust

Which metals are highly reactive metals?

1. Iron (Fe)
2. Mercury (Hg)
3. Potassium (K)
4. Platinum (Pt)

Making exercise

Make 17+20 (12 min in silence)

Finished? Make 16a,b,c,e, 18, 19, 21, 22, 27

Reflection

At the end of the lesson you can:

• State six properties of metals.
• Describe what an alloy is.
• Derive properties from the nobility of a metal.