ions Flashcards
what is the defonistion for a compound?
two or more elements chemically bonded together
what dose a metal look like
a lattice structure with positive ions and a sea of delocalised electrons
where are metals found in a periodic table
on the left side
in which state are inter-molecular forces between particles the strongest?
solid
in which state is the kinetic energy of the particles the highest?
gas
what is the correct definition of boiling point?
the tempreture at which liquid becomes a gas
what is an example of mono-atomic substances?
helium
what is an ion
an atom that has gained / lost electrons
why do atoms loose or gain electrons when they react
they want to get a full outer shell
what ions do gruop 2 metals form
+2
why does magnesium chloride conduct electricity as a liquid
ions move around in the liquid
whats the defonition for a mixture
two or more elements not chemically bonded
what does evaporation mean
when a liquid becomes a gas
what does melting mean
when a solid becomes a liquid
describe a solid
vibrates in a fixed position
tightly compacted
describe a gas
moves freely in all direction
irregular pattern
spread out
describe a liquid
takes the shape of the contanior
irregular pattern
particles slide past each other
what is electrolysis
is is where electricity is used to break ionic compounds
what is activation energy
is the energy needed to start a chemical reaction
what is a monomer
a repeated subunit of a polymer
what are polymers
a large molecule made up of a repeating pattern
give the equation for nuetralization
sulphuric acid + sodium hydroxide -> sodium sulfate +water
give the equation for combustion
methan + oxygen -> carbon dioxide +water
give the equation for thermal decomposistion
calcium carbonate -> calcium oxide +carbon dioxde
