Physical Science G-11 Midterm Exam 2023-2024 PDF

Republic of the Philippines Department of Education Cordillera Administrative Region Schools Division of Abra **LUL-LUNO NATIONAL HIGH SCHOOL** **Luba, Abra** **PHYSICAL SCIENCE- G11** **MIDTERM EXAM** **SY 2023-2024** **Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_...

Republic of the Philippines Department of Education Cordillera Administrative Region Schools Division of Abra **LUL-LUNO NATIONAL HIGH SCHOOL** **Luba, Abra** **PHYSICAL SCIENCE- G11** **MIDTERM EXAM** **SY 2023-2024** **Name:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ Score:\_\_\_\_\_\_\_\_\_\_\_\_\_** **Date:\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_** I. Multiple Choices. Read and analyze the following questions. Write the letter of your best answer on the space provided before each number. \_\_\_\_\_\_1. It explains how the elements were initially formed and believed to have started the birth of the Universe. a.) Stellar Formation c.) Big Bang Theory \_\_\_\_\_\_2. Modern cosmology supposes that the Universe came from a \"Big Bang\" event about 13 billion years ago. Evidence for this is\_\_\_. a.) the uniformity of the abundance of hydrogen and helium. c.) Hubble expansion \_\_\_\_\_\_3. Which of the following refers to the processes of producing light elements like Helium? \_\_\_\_\_4. Why is the Big Bang Theory the most accepted theory for how the universe was formed? a). It is the simplest explanation for the evidence we have. b). A small group of scientists said it was the best opinion c.) Religion says it's the best theory d). Science has proven it beyond doubt \_\_\_\_5. Which of the following has been used as evidence to support the universe is expanding from a historical beginning explosion? \_\_\_\_6. What do the initial moments after the Big Bang have in common with the universe as it exists now? \_\_\_\_\_7. Which of the following describes stellar nucleosynthesis? \_\_\_\_\_8. It is the lightest element and the starting point of nuclear fusion reaction in stars. \_\_\_\_\_9. These are atoms of an element that have the same number of protons but have different number of neutrons. a.) Isotopes c.) Nucleus \_\_\_\_10. In this cosmic stage, formation of elements heavier than iron occurred and it happened after a violent explosion. a.) Stellar explosion c.) Stellar formation and evolution \_\_\_\_11. It is the building blocks of matter. \_\_\_\_12. The two Greek philosophers who first proposed the ideas of atom. \_\_\_\_13. He proposed that there are only 4 elements in the Universe -- air, fire, water and Earth. \_\_\_\_14. The following statements are true about Aristotle's notion of elements EXCEPT one: ­\_\_\_\_15. A pseudo-science which became basis for modern day chemistry. Find the number of Proton of the following elements. (Items 16, 17, 18,19, 20) \_\_\_\_\_16.) Manganese (Mn) \_\_\_\_\_17.) Potassium (K) \_\_\_\_\_18) Arsenic (As) \_\_\_\_\_19. Calcium (Ca) \_\_\_\_\_20. Cobalt (Co) \_\_\_\_\_21. What subatomic particle determines an atom's identity? \_\_\_\_22. In a neutral atom, the number of protons is \_\_\_\_\_\_\_\_\_ to the number of electrons. \_\_\_\_23. The following statements are TRUE about Dalton's Atomic Theory EXCEPT one: \_\_\_\_24. 23. What three sub-atomic particles make up an atom? \_\_\_\_25. The region outside the nucleus where an electron can most probably be found is the \_\_\_\_26. Which particles are referred to as nucleons (subatomic particles located in the nucleus)? \_\_\_\_27. Which subatomic particle is negative? \_\_\_\_28. What is a substance that cannot be broken down into simpler components? \_\_\_\_29. The atomic number of an element is the total number of which particles in the nucleus? a. electrons c. protons b. neutrons d. protons and electrons \_\_\_\_30. The total number of protons and neutrons in the nucleus of an atom is its \_\_\_\_31. Which of the following statements in NOT true? \_\_\_\_32. Which of the following will be the solvent if a nonpolar substance dissolves in an unknown liquid? \_\_\_\_33. Which of the following is an example of non-polar molecule? \_\_\_\_34. Which of the following is a common structure of a non-polar molecule? \_\_\_\_35. Which of the following is TRUE about boiling point of polar molecules? \_\_\_\_36. Which of the following is TRUE about H2O? \_\_\_\_37. It is a quantity that describes the polarity of a bond in a molecule. a. Dipole moment c. London dispersion b. Hydrogen bond d. all of the above \_\_\_\_38. Which of the following refers to the capacity of a liquid to be mixed with other liquids to form a homogenous substance? a. Miscibility c.) Polarity b. Dipole moment d. Symmetry \_\_\_39. Which one of the following properties decreases once the strength of its intermolecular forces increases? \_\_\_40. Which of the following phase transitions shows a decrease in the intermolecular forces of attraction? II. Illustrate the Lewis dot structures, name the shape of the molecule, and identify whether the following molecules are polar or nonpolar based on structure. +-----------------+-----------------+-----------------+-----------------+ | | Lewis Dot | Shape | Polarity | | | structure | | | +=================+=================+=================+=================+ | 1. AlCl3 | | | | +-----------------+-----------------+-----------------+-----------------+ | 2. H2O | | | | +-----------------+-----------------+-----------------+-----------------+ | 3. N2O | | | | +-----------------+-----------------+-----------------+-----------------+ | 4. HF | | | | +-----------------+-----------------+-----------------+-----------------+ | 5. PCl3 | | | | +-----------------+-----------------+-----------------+-----------------+ | 6. CO2 | | | | +-----------------+-----------------+-----------------+-----------------+ | 7. HCN | | | | +-----------------+-----------------+-----------------+-----------------+ | 8. CH4 | | | | +-----------------+-----------------+-----------------+-----------------+ | 9. SO2 | | | | +-----------------+-----------------+-----------------+-----------------+ | 10. H2Se | | bent | polar | +-----------------+-----------------+-----------------+-----------------+ **Answer Key:** 1. **C** 2. **D** 3. **A** 4. **A** 5. **D** 6. **D** 7. **A** 8. **D** 9. **A** 10. **A** 11. **D** 12. **A** 13. **C** 14. **A** 15. **A** Note: \* No. of proton is equal to the atom. No. 16. **Mn- 25** No. of proton=no. of electron= atomic. No. 17. **K-19 \*VSEPR-** Valence Shell Electron Pair Repulsion Theory 18. **As-33 \*** No. of Neutron-( Subtract the no. of proton/atomic no. to the 19. **Ca-20** mass no.) 20. **Co-27** 21. **A** 22. **A** 23. **D** 24. **B** 25. **B** 26. **D** 27. **A** 28. **A, c, d** 29. **D** 30. **A** 31. **B** 32. **B** 33. **B** 34. **D** 35. **A** 36. **B** 37. **A** 38. **A** 39. **D** 40. **B**