Ключевые слова: academic, back, board, chemical, chemist, chemistry, class, classroom, college, down, education, educational, elements, exam, exams, homework, kneeling, lab, laboratory, law, lazy, learn, learning, man, mendeleev, nerd, periodic, pray, praying, preparation, preparing, rear, research, revising, revision, school, science, scientific, scientist, student, study, studying, symbols, table, tables, university, view, white, whiteboard, young,