Écolier intelligent ajoutant des gouttes d'agent dans le tube avec réactif vert, chimie - Photo & image de stock

Little chemist in protective glasses checking reaction in tube with green liquid

Schoolboy watching reaction in tube with green liquid, chemistry lessons

Schoolboy looking at red liquid in flask and scratching head, having no idea

Boy in protective glasses pouring chemical substance in tube, checking reaction

Little nerd comparing colorful liquids in flasks watching reaction, chemistry

Boy in protective gloves and glasses writing down chemical experiments results

Chemistry student dripping liquid in test tube conducting experiment in lab

Chemistry experimenter writing down results of scientific researches in lab

Female chemist looking at colored liquids in flasks, developing new substance

Chemistry student mixing liquids in scientific laboratory, conducting experiment

Chemistry scientist conducting researches in office, holding flasks with liquids

Laboratory worker writing down chemical research results, conducting experiments