University:
Kentucky State University
Course:
BIO 111 | Principles of Biology
Academic year:

2020
Views:

380

Pages:

2
Author:

Walker G

Chapter 2 core content 1.What type of bond is joining the two hydrogen atoms? -covalent 2.A(n) _____ refers to two or more atoms held together by covalent bonds. -molecule 3.This atom can form up to _____ single covalent bond(s). -4 4.A(n) _____ bond joins these two oxygen atoms. -double covalent 5.The brackets are indicating a(n) _____ bond. -hydrogen 6.What name is given to the bond between water molecules? -hydrogen 7.Atoms with the same number of protons but with different electrical charges _____. -are different ions 8.In salt, what is the nature of the bond between sodium and chlorine? -ionic 9.An ionic bond involves _____. -ionic 10.What type of bond joins the carbon atom to each of the hydrogen atoms? -single nonpolar covalent 11.What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? -6 12.Which of these refers to atoms with the same atomic number but different atomic masses? -these atoms are isotopes 13. Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine have? -10 14.An uncharged atom of boron has an atomic number of 5 and an atomic mass of 11. How many protons does boron have? -5 15.First use the labels of Group 1 to identify the atoms and charges. ● Then use the labels of Group 2 to identify the bonds. a.H b.o c.H d.(+) e.(-) F. hydrogen bond G.polar covalent bond 16.What is the arrow pointing to? -hydrogen ion 17.What is the arrow pointing to? -hydroxide ion 18.In a neutral solution the concentration of _____. -hydrogen ions equal to the concentration of hydroxide ions 19.How does the pH of the solution on the right compare with that of the solution on the left?-the solution on the right is basic relative to the solution on the left. 20.Substances that cannot be broken down into other substances are called __________. -elements 21.In an atom with a neutral overall charge, the number of protons is equal to the __________. -number of electrons 22.What is the term for an atom that is electrically charged as a result of gaining or losing electrons? -ion 23.The tendency of water molecules to stick together is called __________. -cohesion 24. What is the pH inside most living cells? -PH 7

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