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The Aufbau principle dictates the manner in which electrons are filled in the atomic orbitals of an atom in its ground state. vector illustration.
lobby in the rush hour is made in the manner of blur and a blue tonality
Businesswoman shaking hand of male coach mentor thanking for successful presentation at company meeting, presenter handshaking female boss making good first impression before lecture or seminar
Portrait of Polite Gentleman in Black Suit and Leather Gloves Bowing Elegantly and Doffing Bowler Hat. Concept of Butler and Professional Hospitality. Act of Humble Courtesy.
A young man preparing ayurvedic medicine in the traditional manner.

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