Which particle has a charge of -1?
proton
neutron
electron
nucleus

Electrons have a negative charge. 

I use this to remember

protons---> P for positive, they have a positive charge

neutrons---> neutrons sounds like NEUTRAL, they have no charge, they are neutral

electrons---> this is the last one out of three, by knowing proton are positive, and neutrons are neutral, there is only one left for electrons. they are negative. 

If you open the bottle of perfume then nothing but the smell will come out of it and yes it is a type of gas smell because it’s say it in english so i can understand better and you