Bio Tests answers

Bio Tests answers - Bio Tests Chapter 2-3 1. oxygen has an...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Bio Tests Chapter 2-3 1. oxygen has an atomic number of 8. Therefore it must have 8 protons 2. Each element is unique and different from other elements because of its atomic number 3. What do atoms form when they share electron pairs? molecules 4. An atomic form of an element containing different numbers of neutrons is an isotope 5. Results from a transfer electrons between atoms. ionic bond 6. Results from an unequal sharing of electrons between atoms, Polar covalent bonds 7. Explain most specifically the attraction of water molecules to each other. hydrogen bond 8. Would be least affected by the presence of water. nonpolar covalent bond 9.What is the max number of covalent bonds an element with atomic number 16 can make with hydrogens. 2 10.How do isotopes differ from each other number of electrons 11.The reactive properties of an atom depend on the number of electrons in the outer valence shell in the atom. 12. The mass number of element can be easily approximated by adding together number of
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
protons and neutrons 13. How many electrons does carbon have in its outermost energy level? 4 14. How many neutrons does the nucleus of sulfur contain? 16 15. Based on electrons configuration, which of these elements would exhibit chemical behavior most like that of S 16. Which of the following is trace element that is essential to humans? Iodine 17.What bonds is easily disrupted in the presence of water? Ionic 18. From its atomic number of 15, it is possible to predict that the phosphorus atom has only B and C correct 19. The ionic of the sodium chloride is formed when Chlorine gains an electron from sodium 20.The number of electrons carbon shares with oxygen molecules in a molecule of Co2 4 21. How many electrons would be expected in the outer energy level of an atom with atomic number 17? 7 22. Which four elements make up approximately 96% of living matter? Carbon, hydrogen, nitrogen, oxygen 23.What results from the chemical illustrated in figure 2.3? ions 24. A covalent chemical bond is one in which outer shell electrons are shared by two atoms so as to satisfactorily fill the outer electron shells of both 25. What do the 4 elements most abundant in life—carbon, oxygen, hydrogen, and nitrogen—have in common? They all have unpaired electrons in their valence shells. 26. Which type of bond is important in large biological molecules? Ionic, polar covalent, hydrogen, covalent
Background image of page 2
27. Van der Waals interaction results when electrons are not symmetrically distributed in a molecule. 28. Which of the following is NOT considered a weak molecule interaction? Covalent bond 29. The partial negative charge at one end of a water molecule is attracted to the partial positive charge of another water molecule. What is this attraction called?
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/07/2009 for the course BIO 066.6 taught by Professor Darby during the Spring '09 term at Sierra.

Page1 / 24

Bio Tests answers - Bio Tests Chapter 2-3 1. oxygen has an...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online