There are 11 Plasmids in total some are found within the story some you have to buy from the gathers garden. they are as follows
Electro Bolt - Story Lead
Telekinesis - Story Lead
Incinerate - Story Lead/Buy
Winter Blast - Buy
Decoy - Buy
Cyclone Trap - Buy
Hypnotize - Story Lead
Scout - Buy
Insect Swarm - Buy
Security Command - Story Lead
Summon Elenor - Story Lead
I have added a link to a video which I claim no rights to which should help