Ключевые слова: abstract, atom, biology, black, cell, chemistry, circle, concept, design, education, element, energy, flat, icon, illustration, isolated, long, medicine, micro, microscopic, model, molecular, molecule, neutron, nuclear, nucleus, object, orbit, organization, particle, physics, pictogram, power, proton, research, round, science, scientific, shadow, shape, sign, simple, single, sphere, structure, symbol, technology, web, white,