Ключевые слова: abstract, atom, biology, black, cell, chemistry, circle, concept, design, diagonal, education, element, energy, gradient, gray, grid, icon, illustration, inclined, isolated, micro, microscopic, minimalistic, model, molecular, molecule, neutron, nuclear, nucleus, object, orbit, particle, physics, power, proton, research, round, science, scientific, shape, simple, single, sphere, structure, symbol, technology, transparent, web,