Μαθητής με δοκιμαστικούς σωλήνες κατά του μαυροπίνακα με γραπτές τύπους χημείας - Φωτογραφίες & Εικόνες Αρχείου

Schoolboy writing chemistry formula on glass board against color background. Space for text

Emotional pupil shielding himself against blackboard with written chemistry formulas. Space for text

Schoolboy holding flask and notebooks near chalkboard with chemical formulas

Schoolboy holding flask and notebooks near chalkboard with chemical formulas

Little girl scientist examining test tube with chemical reagent. Research and education in school. Chemical laboratory with microscope and glass flasks. Schoolgirl making experiment in chemistry class

Smiling boy in protective glasses conducting chemical experiments in class

Cute boy looking through magnifying glass against blackboard background

Emotional child in laboratory after explosion. Dangerous experiment

Little school child in laboratory uniform with graduate cap and chemical formulas on grey background

Little school child in laboratory uniform with graduate cap and chemical formulas on grey background

Cute little child wearing glasses near chalkboard with chemical formulas

Child doing chemical research in laboratory. Dangerous experiment

Schoolchild making experiment at table in chemistry class

Little school child in laboratory uniform with graduate cap and chemical formulas on grey background

Child doing chemical research in laboratory. Dangerous experiment