BSC 1005 CHAPTER 2 EXAM QUESTIONS AND ANSWERS

BSC 1005 CH APTE R 2 EXA M QUESTION S AN D ANSWE RS 1. In living things, the four most prevalent elements are: A) Oxygen, carbon, hydrogen, and potassium. B) silicon, carbon, nitrogen, and hydrogen. C) Calcium, carbon, nitrogen, and hydrogen. D) Carbon, oxygen, nitrogen, and hydrogen. E) Phosphorus, nitrogen, hydrogen, and carbon. ANSWER D) carbon, oxygen, nitrogen, and hydrogen 2. The same applies to carbon-14: A) more neutrons than carbon-12, but less protons. B) Carbon-12 as the atomic mass and number. C) has the same amount of neutrons as carbon-13 due to its atomic number. D) The atomic mass of carbon-13 and carbon-12 combined. E) the same amount of neutrons as carbon-12 due to its atomic mass. ANSWER A) more neutrons than carbon-12, but less protons. 3. The components of all matter on Earth, both living and non-living, are: A) the cells. B) Genetics. C) Carbohydrates. D) Phospholipids. Atoms (E) - Response E) atoms 4. How many elements are present in your body out of all the elements that exist on Earth? A) Four B) ten C) 25 D) 90 E) 100-RESPONSE C) 25 5. What sets one element apart from another, such neon and chlorine, is the quantity of: A) the nucleus's protons. B) The nucleus's protons and neutrons. C) electrons. D) The electrons, protons, and neutrons. E) nucleus with neutrons - ANSWER A) nucleus with protons. 6. If a sodium atom were divided, what would happen? A) Salt would form on you. B) The fragments would unite into a homogeneous crystal structure. C) The matter particle would no longer have its fundamental characteristics. D) There would be two sodium atoms. E) An extra electron shell would be produced. - ANSWER C) The matter particle would no longer possess its fundamental characteristics. 7. True or False: Silver has all of its qualities even after it is cut into infinitely little bits. A) Accurate. Every particle, including the subatomic particles that comprise the element, has the characteristics of the component. B) Accurate. The smallest units of matter, atoms have the characteristics of their element and are indivisible. C) Untrue. The bits lose their silver characteristics as soon as they are smaller than a silver atom. D) Untrue. The atoms of silver are too tiny to have the characteristics of silver . E) Untrue. When a chunk of silver is divided into smaller bits, the individual atoms start to exhibit characteristics of smaller components - False (ANSWER C). The bits lose their silver characteristics as soon as they are smaller than a silver atom. 8. Which of the following best describes an oxygen atom? A) Nine neutrons are present in the majority of oxygen atoms found in nature. B) There are eight protons in every oxygen atom. C) One oxygen isotope is nitrogen-15.