Edexcel A-Level Chemistry Topic 6 questions
and answers
Define the general formula - correct answersAlgebraic formula that can describe
any member of a family of compounds.
Define empirical formula. - correct answersThe simplest whole number ratio of
atoms of each element in a compound.
Define molecular formula - correct answersThe actual number of atoms of each
element in a molecule
Define structural formula - correct answersShows the arangement of molecules
carbon by carbon.
Define skeletal formula - correct answersBonds of the carbon 'skeleton' only
Define displayed formula. - correct answersFully drawn out molecule, shows all
atoms and their arrangement.
Define a homologous series - correct answersOrganic compounds with same
functional group and general forumula
,Edexcel A-Level Chemistry Topic 6 questions
and answers
Define functional group - correct answersgroup of atoms in a molecule
responsible for the characteristic reactions of that compound
What is a mechanism? - correct answersWhere a reaction is broken down into
individual stages
What does a curly arrow mean in a mechanism? - correct answersPoints to where
electron pairs are moving to.
Give an example of radical substitution. - correct answersradical substitution of
halogens in alkanes to make halogenoalkanes
Give an example of electrophilic addition - correct answersof halogens and
hydrogen halides to alken to make halogenoalkanes
Give an example of nucleophilic substitution - correct answersof primary
halogenoalkanes with hydroxide ions to make alcohol or with ammonia to make
amines
Define a nucleophile - correct answersElectron pair donor,
, Edexcel A-Level Chemistry Topic 6 questions
and answers
often negatively charged or with a lone pair,
electron rich so attracted to area with few electrons:
normally attracted to polar bonds or positive ions
Define an electrophile - correct answersElectron pair acceptor,
normally positively charged,
electron poor, attracted to electron rich areas:
negative charge, lone pairs or around double bonds.
Define a radical - correct answersHave a unpaired electron, so very reactive (with
anything)
Define an (structural) isomer - correct answersSame molecular formula but
different arangement/structure
and answers
Define the general formula - correct answersAlgebraic formula that can describe
any member of a family of compounds.
Define empirical formula. - correct answersThe simplest whole number ratio of
atoms of each element in a compound.
Define molecular formula - correct answersThe actual number of atoms of each
element in a molecule
Define structural formula - correct answersShows the arangement of molecules
carbon by carbon.
Define skeletal formula - correct answersBonds of the carbon 'skeleton' only
Define displayed formula. - correct answersFully drawn out molecule, shows all
atoms and their arrangement.
Define a homologous series - correct answersOrganic compounds with same
functional group and general forumula
,Edexcel A-Level Chemistry Topic 6 questions
and answers
Define functional group - correct answersgroup of atoms in a molecule
responsible for the characteristic reactions of that compound
What is a mechanism? - correct answersWhere a reaction is broken down into
individual stages
What does a curly arrow mean in a mechanism? - correct answersPoints to where
electron pairs are moving to.
Give an example of radical substitution. - correct answersradical substitution of
halogens in alkanes to make halogenoalkanes
Give an example of electrophilic addition - correct answersof halogens and
hydrogen halides to alken to make halogenoalkanes
Give an example of nucleophilic substitution - correct answersof primary
halogenoalkanes with hydroxide ions to make alcohol or with ammonia to make
amines
Define a nucleophile - correct answersElectron pair donor,
, Edexcel A-Level Chemistry Topic 6 questions
and answers
often negatively charged or with a lone pair,
electron rich so attracted to area with few electrons:
normally attracted to polar bonds or positive ions
Define an electrophile - correct answersElectron pair acceptor,
normally positively charged,
electron poor, attracted to electron rich areas:
negative charge, lone pairs or around double bonds.
Define a radical - correct answersHave a unpaired electron, so very reactive (with
anything)
Define an (structural) isomer - correct answersSame molecular formula but
different arangement/structure
