2.1 Flashcards
(16 cards)
5 metal properties
high melting and boiling point due to strong electrostatic forces between the delocalised electrons and the metal atoms
Ductile
Malleable
Good conductors of heat
Good conductors of electricity
What metals are in ionic bonding and what is an ionic bond?
Metal and nonmetal and when oppositely charged ions become strongly attached to another by electrostatic forces
What structure is ionic compounds in?
Giant ionic lattice
properties of ionic compounds
High melting and boiling point
When ionic compounds melt or dissolve, the ions are free to move so they can carry electricity
How come some ionic compounds have higher melting or boiling points than others?
as they have greater charges on the ions, therefore stronger electrostatic forces of attraction
how are covalent bond strong?
As they have strong electrostatic attraction between the positive nuclear of the atoms and negative electrons in each shared
properties of simple molecular substances bonds
Week into molecular forces therefore low melting and boiling points
Gas liquids at room temperature
Don’t conduct electricity
Insoluble
Difference between diamond and graphite properties
diamonds have 4 covalent bonds whereas graphite carbon only have 3
Strong covalent bonds and diamonds make them really hard whereas graphite is soft and slippery as there aren’t any covalent bonds between the layers
what can Florines be used for?
To deliver drugs
why are nano tubes useful?
As they have high tensile strength but low density so they can strengthen their materials without adding much weight
what can cell nano particles be used for?
They have antibacterial anti-viral and antifungal properties and can be used for deodorant
What’s can’t titanium dioxide non-particles be used for?
Suncream as they are better at protecting the skin from harmful UV rays than traditional ones and a better coverage and more transparent which people prefer
they can also be used as a layer for self cleaning windows as the UV light from the Sun causes them to catalyse the breakdown of dirt so when it rains, it spreads out the water and washes the dirt away without leaving streaks
why are people concerned about non-particles?
As the long-term effects haven’t been researched yet, we have already used suncream and deodorant
what are smart materials?
Materials that react to the environment
What are the five smart materials?
thermographic pigments, photochromic pigments, polymer gels, shape memory alloys and shape memory polymers
