1st Summative Test Sci9 Q2 PDF

**SCIENCE 9** **QUARTER 2** **1^st^ Summative Test** I. **Give the electron configuration of the following elements in the table following the Aufbau, Hunds, Pauli Exclusion principles and the short method.** Chemical Symbol O R B I T A L Electron Configuration 1s 2s 2px 2py 2pz 3s 3p...

**SCIENCE 9** **QUARTER 2** **1^st^ Summative Test** I. **Give the electron configuration of the following elements in the table following the Aufbau, Hunds, Pauli Exclusion principles and the short method.** Chemical Symbol O R B I T A L Electron Configuration 1s 2s 2px 2py 2pz 3s 3px 3py 3pz 4s 3d1 3d2 3d3 3d4 3d5 Calcium 20 A. B. Phosphorus 15 A. B. Aluminum 13 A. B. Copper 29 A. B. Nickel 28 A. B. II. **Choose the name the scientist that proposed the following atomic theory or model inside the box.** 1. Uncertainty Principle 2. Everything is made up of an atom and it is indivisible. 3. Father of Quantom Mechanics 4. Plum Pudding Atomic Model 5. He said that electrons moved in definite orbits around the nucleus much like planets that circles around the sun. III. **MULTIPLE CHOICE.  Read and answer in the best way you can. Write only theLETTER of your answer.** 1\. Who proposed the probability that electrons will be found in certain locations  around the nucleus of an atom?      a. Neils Bohr b. Erwin Schrodinger           c. Ernest Rutherford               d. J.J. Thomson 2\. States that every orbital in a sublevel is singly occupied before any orbital is doubly occupied.      a. Aufbau Principle    b. Pauli Exclusion Principle       c. Hund's rule  d. Octet rule       3\. Which of the following sublevels is correctly designated?      a. 1p^5^           b. 3f^9^        c. 2p^6^         d. 3d^11^ 4\. What is the maximum number of orbitals on the 2nd main energy level?      a. 2 b. 4 c. 8 d. 9 5\. The quantum-mechanical model of the atom       a. describes an electron probability distribution that determines the most  likely location of an electron.       b. is the currently accepted atomic model.        c. makes predictions based on Schrodinger's wave equation.       d. All of the above 6\. Defined as the region within an atom that encloses where the electron is likely to be 90%  of the time.      a. atomic orbital     b. atomic number   c. electron configuration   d. quantum number 7\. What is the maximum number of electrons that can be on the p sublevel?      a. 2 b. 4 c. 6 d. 8 8\. How many orbitals are there in the \"d\" sublevel?      a. 1 b. 3 c. 5 d. 10 9\. How many electrons can the f sublevel hold?      a. 2 b. 6 c. 10 d. 14 10\. It tracks the location of the electrons in its most stable arrangement. A. electron configuration b. electronegativity c. ionization d. atomic number 11\. What happens when ann electron jumps from a higher to lower energy level? A. colored light is given off B. the atom becomes excited C. another electron goes from low energy to high energy D. this process is not possible 12\. **Niels Bohr refined Rutherford's model of an atom. Based on his experiments, how did Bohr describe the electrons?** ***a. moving in indefinite orbits around the nucleus c. it is impossible to determine their location*** ***b. moving in definite orbits around the nucleus d. mass is concentrated in the nucleus*** **13. According to quantum mechanical model, where can we possibly find the electron?** ***A. around the nucleus B. inside the nucleus C. both A and B D. none of these*** **14. Which among the following shows that atom is stable? Having \_\_ valence electrons.** ***A.3 B.5 C 6 D. 8*** **15. What is the atomic number of the element having neutral atoms with the configuration 1s^2^ 2s^2^ 2p^3^ ?** ***A. 2 B. 5 C. 7 D. 9*** **16. The second principal energy level of an atom can hold a total of \_\_ electrons.** ***A. 2 B. 6 C. 8 D. 10*** ***For questions number 17-25, refer to the following choices below:*** A. 17. **The smallest unit of matter.** 18. **Subatomic particle that is negatively charged.** 19. **Subatomic particle that is positively charged.** 20. **Subatomic particle that has no charge.** 21. **Dense region at the center of an atom.** 22. **The number of protons and electrons is equal to the \_\_\_\_\_\_\_\_\_\_\_\_\_\_.** 23. **It can be found inside the nucleus of an atom.** 24. **It can found outside the nucleus of an atom.** 25. **It makes up everything in our universe.** IV. Essay Explain how the quantom mechanical model of an atom describes the energies and positions of electrons. (5pts)