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Biology 1201 Exam 1 Questions and Answers Already Passed
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Biology 1201 Exam 1 Questions and Answers Already Passed About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter? Carbon, Hydrogen, Nitrogen, Oxygen What is the atomic number of an atom that has 6 p...

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  • April 20, 2024
  • 18
  • 2023/2024
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Biology 1201 Exam 1 Questions and Answers Already Passed About 25 of the 92 natural elements are known to be essen tial to life. Which four of these 25 elements make up approximately 96% of living matter? ✔✔Carbon, Hydrogen, Nitrogen, Oxygen What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? ✔✔6 Which of these refers to atoms with t he same atomic number but different atomic masses? ✔✔Isotopes Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine have? ✔✔10 An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many protons does boron have? ✔✔5 Atoms with the same number of protons but with different electrical charges _____. ✔✔Are different ions In salt, what is the nature of the bond between sodium and chlorine? ✔✔Ionic What is the result of the animated process? A bond between Na and Cl form where one electron from Na transfers to Cl ✔✔a positively charged sodium ion and a negatively charged chlorine ion An ionic bond involves _____. ✔✔an attraction between ions of opposite charge What type of bond is joining th e two hydrogen atoms? ✔✔Covalent A(n) _____ refers to two or more atoms held together by covalent bonds. ✔✔molecule This atom can form up to _____ single covalent bond(s). Atom with 4 valence electrons ✔✔4 A(n) _____ bond joins these two oxygen atoms. ✔✔A double covalent bond The brackets are indicating a(n) _____ bond. ✔✔hydrogen bond What name is given to the bond between water molecules? ✔✔hydrogen Which of these figures correctly illustrates the nature of the bonding of H2O? ✔✔ What type of bond joins the carbon atom to each of the hydrogen atoms? ✔✔Single (nonpolar) covalent A substance that cannot be broken down into other substances by ordinary chemical procedures is a(n) _____. ✔✔element Which of the following subatomic particles always has a positive charge? ✔✔proton Changing the number of _____ would change an atom into an atom of a different element. ✔✔protons

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