Ключевые слова: abstract, atom, atomic, biology, chemical, chemistry, color, colorful, concept, contour, design, electron, element, energy, filled, flat, formula, icon, illustration, isolated, line, linear, lineart, micro, model, molecular, molecule, neutron, nuclear, nucleus, object, orbit, outline, particle, physics, power, proton, research, science, scientific, shape, sign, sphere, structure, symbol, technology,