Ключевые слова: abstract, art, atom, attached, chemistry, circle, connection, design, direction, education, electron, element, energy, graphic, gray, icon, illustration, isolated, magnification, micro, microscopic, model, molecular, molecule, neutron, nuclear, nucleus, object, orbiting, particle, physics, power, proton, research, round, science, scientific, scientist, shape, sign, single, small, sparse, sphere, structure, symbol, technology, threedimensional, web,