1. Metals III

2. Goal of the class
To introduce the different types of metals found on the periodic table.
Question of the day: How could the stability of an atom be predicted?
Previous Answer: The reactivity of caesium is greater than sodium.
Previous question: How would you expect the reactivity to be for sodium vs. caesium?

3. Transition metals
The transition metals are placed in the centre of the periodic table, between groups 2 and 3.
They are generally hard and dense, and less reactive than the alkali metals
Same as before

4. Transition Metals
The transition metals have the following properties in common:
they form coloured compounds
they are less reactive than alkali metals such as sodium
they have high melting points - but mercury is a liquid at room temperature
they are usually hard and tough
they have high densities
they are good conductors of heat and electricity
they can be hammered or bent into shape easily

5. Transition Metals they are good conductors of heat and electricity
they can be hammered or bent into shape easily

6. Lanthanides Originally called “rare earth metals”
Can be difficult to separate within the same group
Soft and malleable compared to transition metals
Can make very strong magnets
Talk about ions formed Na+, Li+, K+ etc

7. Actinides Actinides all have radioactive elements
No stable isotopes
Uranium is the largest element found in nature
Many actinides are also synthetic elements
Their size and lack of stability makes them ideal for nuclear reactions
Talk about ions formed Na+, Li+, K+ etc

8. Stability
Elements have a different levels of stability depending on their size.
The strong force of the nucleus will hold the nucleus together
Electromagnetic field pushes the protons apart
The more protons, the more it is pushed apart
Iron is the most stable element
When elements are too large, there are no stable isotopes
Conductivity is both thermal and electrical

9. Stability
Conductivity is both thermal and electrical

10. Synthetic elements Synthetic elements are elements created in a lab
Much larger than elements found in nature
Created by using a particle accelerator to collide atoms together
Accelerates particles to relativistic speeds
The atoms stick together forming a new nucleus
Nucleus eventually breaks apart
  Synthetic elements
  Rare radioactive natural elements; often produced artificially
In chemistry, a synthetic element is a chemical element that does not occur naturally on Earth, and can only be created artificially. So far, 20 synthetic elements have been created (those with atomic numbers 99–118). All are unstable, decaying with half-lives ranging from a year to a few milliseconds.

11. Synthetic elements 208,82Pb + 58,26Fe -> 265,108Hs +1,0n
Hassium-265
Nuclear transmutation

12. Poor Metals Share groups with non metals and metalloids
Many different name for this grouping
Low melting temperature
High electronegativity
Softer than transition metals
208,82Pb + 58,26Fe -> 265,108Hs +1,0n
Hassium-265
Nuclear transmutation

13. Vocabulary Relativistic – Velocities comparable to the speed of light.
Particle accelerator – a device that accelerates particles to extremely high speeds, for the purpose of inducing high energy reactions or producing high energy radiation.

14. Homework Read: Chemical Building Blocks pages 98-105
Complete workbook pages