Χημικός αγόρι που κοιτάζει φιάλες με υγρά που σχεδιάζουν πειράματα - Φωτογραφίες & Εικόνες Αρχείου

Sad boy thinking about new scientific experiments during chemistry lesson

Boy in protective gloves and glasses studying sediments in flask with red liquid

Concentrated boy planning to conduct chemical experiment with colored liquids

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

Little genius sitting in protective glasses, chemical liquids in tubes on table

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

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

Chemistry student mixing liquids in scientific laboratory, conducting experiment

Female scientist comparing flasks with colored liquid, detergent laboratory

Chemistry student dripping liquid in test tube conducting experiment in lab

Female chemist studying presence of sediments in flask with red liquid in lab

Woman scientist holding pipette with liquid and taking test tube with reagent