Ключевые слова: accumulator, atom, atomic, atomic mass, background, battery, button, cell, charge, chemical, chemistry, circle, closeup, coin, current, digital, education, electric, electricity, electron, electronic, element, energy, flat, industry, isolated, laboratory, li, lithium, mendeleev, metal, molecular, molecule, number, object, periodic table, physics, power, rechargeable, recycle, recycling, research, round, substance, supply, symbol, technology, voltage, watch, white,