When we describe the number of electrons in the energy levels of an atom in an element, we are describing the “electronic configuration” of that element. The electron configuration of an atom is the representation of the arrangement of electrons distributed among the orbital shells and subshells. Take note that the s sublevel contains 2 e-, for p sublevel is 6 e-, for the d sublevel is 10 e- and for the f sublevel is 14 e-. Examples given the atomic number and following the foregoing rules, we can write the electronic configuration of neon and calcium. Adding the exponents (the number of electrons per orbital) give you the total number of electrons or the atomic number. 1. Ne -10 1s2 2s2 2p6 2. Ca -20 1s2 2s2 2p6 3s2 3p6 4s2 Activity 1 Directions: Arrange the jumbled words. Write your answer on a one (1) whole sheet of pad paper. onDalt ohnJ 1. No such thing as electrons. Tnosmho J.J 2. Electrons are embedded in a solid, positively charged matrix. Ersten fordReruth 3. Electrons are found flying rapidly and randomly around the nucleus in an electron cloud. eilsN rhBo 4. Electrons move around the nucleus in defined, predictable orbits that have certain discrete energy levels called “quantum levels”. gyeren 5. All electrons in a given quantum level are exactly the same distance from the nucleus so they have exactly the same_______. Ed lieBrog 6. The stage is set for the “Quantum Mechanical Model. He proposed that all matter has wave-like properties This means that the motion of electrons is more complex than a simple orbit. dingerSchro 7. He applied de Broglie’s wave motion of particles and Planck/Einstein’s idea of quantized energy particles (photons) to develop a mathematical model which predicts the motion of electrons around the nucleus of an atom. He called this the “Quantum Mechanical Model” of the atom. tronElec 8. It is a negative charge particle. tonPro 9. Positively charge particle. cleNuus 10.Central part of the atom.​