foundation of chem Flashcards
what charge is proton
positive
what charge is electron
negative
why are cation attracted to anions
because they are opposite charges and there is a force of attraction which leads to electrostatic attraction.
when is an ionic bond created
when a cation and anion attract to each other
what is melting point
solid to liquid
what is boiling point
liquid to gas
what happens to particles in a solid
The particles vibrate really closely to each other
what happens to particles in a liquid
The particles slide around on top of each other
what happens to particles in a gas
The particles are moving freely far apart
how are the ions held in a lattice structure
They are held together very strongly by electrostatic forces of attraction which is difficult to set apart
why are ions so hard to melt
because they are held together by electrostatic forces of attraction making it difficult to set apart.
when an ion is melted what physical property does it gain
conduct electricity
chemical structure of metal
-covalent network
-metallic
-ionic
-molecular
what is covalent network
tightly connected atoms that make materials strong and hard
what is metallic
properties of metal
-good electrical and thermal conductivity
-malleability
-ductility (stretching into wires)
ionic
when atoms loose or gain electrons
molecular
group of two or more atoms bonded together
covalent bond
when atoms share electrons
atom
consisting of nucleus proton, electrons and neutrons
ionic compound
anion+ cation, cation usually being metal and anion usually being non-metal
what are ionic compound characteristic
-high melting and boiling point
-able to conduct electricity even in water
lattice structure made of
protons organized in rows with electrons flowing freely around
electrons are delocalized in the lattice structure because…
electrons don’t belong to a particular atom, when they flow around they help electricity flow and make metal flexible
