stuff idk Flashcards
what is an oxidation reaction?
when a substance reacts with oxygen
what is a combustion?
a type of oxidation reaction which results in burning or flames
what is a thermal decomposition reaction?
a substance which breaks down into simpler/smaller substances when heated
what is a displacement reaction?
when a more reactive metal displaces a less reactive mental in a compound
what are acids?
a group of substances with similar properties
what are alkalis?
a group of substances with a soapy feel
what do gas particles cause when they bounce off each other?
pressure
what is the best separation method to separate an insoluble from a liquid?
filtration
what is the best separation method to use to separate solid that has already been dissolved in liquid?
crystallisation
what are a group of metals called?
alloys
in group 7, as we go down does the reactivity increase or decrease?
it decreases.
how many electrons will there be on the outer shell of bromine?
7
james chadwick had discovered…
the neutron
Niels Bohr suggested particles orbit the centre of the nucleus. What are those particles?
electrons
