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CAMARINES NORTE NATIONAL HIGH SCHOOL PARALLEL ASSESSMENT SCIENCE 9 QUARTER 2- WEEK 1 LAS 1: ELECTRONIC STRUCTURE OF MATTER Name : ________________________Section: _____________Date Submitted: __________Score:______ A. DIRECTION. Read each question carefully and write the letter of your answer on the space provided before the number. ________ 1. It states that two electrons can occupy the same orbital only if they have opposite spins so that their magnetic fields of force attract each other. a. Hund’s Rule c. Pauli Exclusion Principle b. Aufbau Principle d. Bohr’s Principle ________ 2. It is the number of protons, which for neutral atoms, is equal to the number of electrons. a. Atomic Number b. Atomic Symbol c. Atomic Mass d. Atomic Name ________ 3. What is the electron configuration of the element Phosphorus? a. 1s22s22p63s23p3 b. 1s22s22p63s23p5 c. 1s22s22p63s5 _________ 4. How many electrons can the p sublevel hold? a. 2 b. 6 c. 10 d. 14 _________ 5. If the first and second energy levels of an atom are full, then what would be the total number of electrons in the atom? a. 6 b. 8 c. 10 d. 18 _________ 6. How many orbitals are in the third principal energy level? a. 3 b. 6 c. 9 d. 2 2 2 6 1 _________ 7. For a neutral atom with the electron configuration of 1s 2s 2p 3s , which statement is FALSE? a. The atomic number is ten. c. The atom is in the ground state. b. The 1s and 2s orbitals are filled. d. The atom is in the excited state. _________ 8. Which orbital designation has the highest energy? a. 3d b. 2p c. 2s d. 4s ________ 9. Which of the following element has an electron configuration of 1s22s22p63s23p64s2? a. Li b. Ne c. Cl d. Ca ________ 10. The following are true about the Periodic Table of Elements, EXCEPT a. The horizontal rows are called periods. b. There are 15 columns and 7 rows in the periodic table of elements. c. The columns on the periodic table are called groups. d. Each element is represented by a chemical symbol. ________ 11. If Iron (Fe) has an atomic number of 26 and has an atomic mass of 56, what is the total number of its protons and neutrons? a. P=26, N= 26 b. P=56, N=26 c. P=26, N=30 d.P= 56,N=56 ________ 12. Name the element that correspond to the following electron configuration,1s22s22p63s23p5? a. Iron b. Chlorine c. Boron d. Nitrogen ________ 13. These are fixed distances from the nucleus of an atom where electrons may be found. a. Nucleus b. Electron cloud c. Electronic configuration d. Energy levels ________ 14. What does the atomic number represent? a. protons or electrons b. protons + neutron c. protons or electrons ________ 15. It states that electrons occupy orbitals in order of increasing energy. a. Pauli Exclusion Principle b. Aufbau Principle c. Hund’s Rule _________________________________ Signature of Parent Over Printed Name

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