3E - periodic table

• Scheikunde
• Middelbare school
• vwo
• Leerjaar 3

Periodic table and nomenclature

Watch the video available on the next slide.

You have to be able to explain the first 7 topics mentioned in the video.

Elements with similar chemical properties are located in the same ...

1. period - horizontal
2. group - horizontal
3. period - vertical
4. group - vertical

Write down in your notebook:

Groups: column (vertical):

elements with similar chemical properties. Know: GR 1, 17 & 18

Periods: rows (horizontal):

increasing atomic number (amount of protons)

Where are the metal elements located in the periodic table?

1. Left-hand side
2. Right-hand side

Write down in your notebook:

metal elements (left-hand side of periodic table except H):  

• Shiny
  
• Good conductors of heat and electricity
  
• High melting points (strong metallic bond)
• Ductile and malleable
  
• Form alloys and ionic compounds.
  

Which is not an element?

1. Alloy
2. Noble metal
3. Alkali metal
4. Alkaline earth metal

Write down in your notebook:

• Alkali metals (GR1): react violently with water.
  Can’t be found pure in nature.
• Noble metals:   unreactive metals (f.i. Au (s), Pt (s), Ag (s)).
• Alloy:            Mixture of two or more metals
  Made in order to improve the properties (f.i. hardness or color).
  

Write down in your notebook:

non-metal elements (right-hand side of periodic table & H):  

• Poor conductors of heat and electricity

• High melting points (strong metallic bond)
• Brittle and dull.
• Form ionic compounds (salts) and molecular compounds.

Halogens (GR17): react easily, including with metals
Noble gases (GR18): unreactive colorless gases

Vragen??

make exercise 15-19, 22-25 (2.2)