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1. The Structure of a Nuclear Weapon - This topic should be avoided due to its sensitive nature and limited publicly available information. 2. Spaceship Building - This topic is too broad and specialized, lacking clearly defined boundaries for an academic research project. 3. Human Relationships - This topic is too broad without a clear focus, making it difficult to research and analyze within the scope of an academic paper.
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Lesson 1 In the Beginning (Big Bang Theory and the Formation of Light Elements)
Content: How the Elements Found in the Universe were Formed
Content Standard:
The learners demonstrate an understanding of:
• the formation of the elements during the Big Bang and during stellar evolution
Learning Competency
The learners:
• give evidence for and explain the formation of the light elements in the Big Bang theory (S11/12PS-IIIa-1)
Summary
• The big bang theory explains how the elements were initially formed the formation of different elements involved many nuclear reactions, including fusion fission and radioactive decay
• There are three cosmic stages through which specific groups of elements were formed.
(1) The big bang nucleosynthesis formed the light elements(H, He, and Li).
(2) Stellar formation and evolution formed the elements heavier than Be to Fe.
(3) Stellar explosion , or supernova, formed the elements heavier than Fe.
• Atoms are the smallest unit of matter that have all the properties of an element. They composed of smaller subatomic particles as protons, neutrons, and electrons. Protons have positive charge, neutrons are electrically neutral; and electrons have a negative charge.
• The nucleus, which takes the central region of an atom, is comprised of protons and neutrons, electrons move around the nucleus.
• The atomic number (Z) indicates the number of protons in an atom. In a neutral atom, number of protons is equal to the number of electrons. The atomic mass (A) is equal to the sum of the number of protons and neutrons.
• Isotopes refer to atoms with the same atomic number but different atomic masses.
• Ions, which are positively or negatively charged particles, have the same number of protons in different number of electrons.
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- 2. Formation of Heavy Elements
- 3. 1. What is the first element form in the universe? Hydrogen Helium Lithium Beryllium
- 4. 2. The atomic number also the number of_______. protons neutron electron positron
- 5. 3. A form of a chemical element in which the atoms have the same number of protons but with a different number of neutrons? fission fusion isotope atomic mass
- 6. 4. How is deuterium formed in universe? nuclear fission nuclear fusion atomic number atomic mass
- 7. 5. Where the heavy elements form? supernova stellar nebula big bang expansion nuclear fusion
- 8. 6. Which among the following elements is a product of alpha decay? Helium-3 Helium-4 Hydrogen-2 Hydrogen-4
- 9. 7. Which type of decay occurs if there are too many protons? Beta+ decay Beta- decay Alpha decay Gamma decay
- 10. 8. What makes elements different from one another? Because of ______. protons neutron electron positron
- 11. 9. Why do some elements have different forms? Because of ______. protons neutron electron positron
- 12. 10. How does helium turn into carbon? alpha decay beta decay gammay decay triple alpha process CNO Cycle
- 13. 11. What is the product of CNO cycle? Helium-4; Nitrogen-14 Helium-3; Nitrogen-14 Helium-3; Carbon-12 Helium-4; Carbon-12
- 14. 12. Nitrogen-14 have _______. 6 neutron; 8 proton 5 neutron; 9 proton 8 neutron; 6 proton 7 neutron; 7 proton
- 15. 13. Lithium-11 have _______. 3 neutron; 8 proton 8 neutron; 3 proton 5 neutron; 6 proton 6 neutron; 5 proton
- 16. 14-15. What is the formula for atomic mass?
- 17. 16-17.
- 20. 1. It is the action or property of molecules adhering to one another due to mutual attraction. surface tension cohesive force adhesive force viscosity
- 21. 2. It is the resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. cohesive force surface tension adhesive force viscosity
- 22. 3. This is described as a force of attraction (attractive force) that attracts all physical forms having mass. strong nuclear force gravitation force electromagnetic force weak nuclear force
- 23. 4. This force is strong enough that it overcomes the repulsive force between the two positively charged protons, allowing protons and neutrons to stick together in an unimaginably small space. strong nuclear force gravitation force electromagnetic force weak nuclear force
- 24. 5. It is the movement of liquids within narrow spaces. It is caused by the molecular attraction force that exists between a liquid and the solid surfaces that surround it. intramolecular forces intermolecular forces surface tension capillary action
- 25. Chemical Formula IMF Bonding 1. NH3 2. K2S 3. SO2 4. CO2 5. F2 6. CaO 7. CH4 8. He 9. O3 10. HF
- 27. Choose the title that appears to be the best in terms of narrowing down a broad topic.
- 28. 1. Symptoms of AIDS Physical Symptoms of AIDS Acquired Immune Deficiency Syndrome or AIDS
- 29. History of Traditional Grammar History of American Traditional Grammar Traditional Grammar 2.
- 30. The Psychology of Reading A Study of Human Behavior Sensory Experience in Reading 3.
- 31. World Ideologies Feminism in the Digital Era Feminism in Nick Joaquin’s Latest Novel 4.
- 32. Communication Skills The Writing Process Pre-writing Strategies 5.
- 33. War Among Nations World War II Japan’s Role in World War II 6.
- 34. Hotel and Restaurant Management Food Serving Techniques Russian-Plate Service 7.
- 35. The University of the Philippines The History of the University of the Philippines The University of the Philippines in the 1960s 8.
- 36. Philippine Transportation System Metro Manila’s Transportation System Manila’s LRT/MRT Systems 9.
- 37. The Enactment of Laws in Congress The Governing Bodies of the Philippines The Congress of the Philippines 10.
- 38. Research Topics to be Avoided.
- 39. 1. The Extent of Filipinos’ Faith in God
- 40. 2. The Structure of a Nuclear Weapon
- 41. 3. Comma as a Punctuation Mark