Transition Metals and Nanoparticles Flashcards
Where on the periodic table are the Transition Metals found?
The middle
What are the melting points of the Transition Metals like?
Relatively high
What are the densities of the Transition Metals like?
Relatively high
What is the strength of the Transition Metals like?
Relatively high
What is the hardness of the Transition Metals like?
Relatively high
What is the reactivity of the Transition Metals with oxygen, water and the Halogens like?
Some do not react at all, most react very slowly
How does the properties of the Transition Metals compare with Group 1?
Opposite
What are Transition Metals useful as?
Catalysts
What often happens when Transition Metals form compounds?
They take on a colour (e.g: cobalt (III) sulfate is red)
What is special about the Transition Metals?
Most can form many differently charged ions
In a compound, how is the charge of a Transition Metal given?
Roman numerals (e.g: manganese (II) sulfate - has an M²⁺ ion)
What is a nanoparticle?
The smallest unit of measure of a particle.
Why do nanoparticles often have different properties to bulk materials of the same material?
They have a higher SA:V ratio
Name 3 uses of nanoparticles.
Catalysts, cosmetics, healthcare, electronics…
Why are nanoparticles potentially hazardous?
They could be hazardous to health or the ecosystem
How big are nanoparticles in m?
1 x 10⁻⁹ to 1 x 10⁻⁷m
How big are nanoparticles in nm?
1 to 100 nanometres
What does PM stand for?
Particle Matter
What is PM?
It is a way of measuring very small particles.
