Question 1 (1 point) In general, chemical reactions occur because reactants are trying to become more O A) electronegative O B) stable C) energetic OD) radioactive Question 2 (1 point) The reaction between Hydrogen and Nitrogen is illustrated in the image. Which statement about this reaction is correct? CO CO 8 N2 + 3H2 2NH 3 The nucleus of nitrogen is being fused with hydrogen to form a new compound. The nucleus of nitrogen is being split to be able to form bonds with hydrogen. Electrons are being shared between nitrogen and hydrogen. 20 Q AA DI Fe F4 F7 F2 F3 F5 & # 8 2 3 4 5 6 Q W E R T YO D) radioactive Question 2 (1 point) The reaction between Hydrogen and Nitrogen is illustrated in the image. Which statement about this reaction is correct? CO CO 8 N2 + 3H2 - 2NH3 The nucleus of nitrogen is being fused with hydrogen to form a new compound. The nucleus of nitrogen is being split to be able to form bonds with hydrogen. Electrons are being shared between nitrogen and hydrogen. Protons are being transferred between nitrogen and hydrogen. Question 3 (1 point) Construct an explanation of how sodium and chlorine combine to form sodium chloride. O Chlorine metal loses a valence electron to become a cation and nonmetal sodium gains a valence electron to become an anion. These ions then form a bond through sharing valence electrons. Sodium metal loses a valence electron to become a cation and nonmetal chlorine 30 G A DII Fe F1 F2 F3 Fa # % 2 3 4 5 6 8 W E R T Y UThe nucleus of nitrogen is being fused with hydrogen to form a new compound. The nucleus of nitrogen is being split to be able to form bonds with hydrogen. Electrons are being shared between nitrogen and hydrogen. Protons are being transferred between nitrogen and hydrogen. Question 3 (1 point) Construct an explanation of how sodium and chlorine combine to form sodium chloride. Chlorine metal loses a valence electron to become a cation and nonmetal sodium gains a valence electron to become an anion. These ions then form a bond through sharing valence electrons. O Sodium metal loses a valence electron to become a cation and nonmetal chlorine gains a valence electron to become an anion. These then form a covalent bond through sharing valence electrons. Sodium metal loses a valence electron to become a cation and nonmetal chlorine gains a valence electron to become an anion. These ions then form an ionic bond through electrostatic attraction. Nonmetal sodium loses a valence electron to become a cation and chlorine metal gains a valence electron to become an anion. These ions then form an ionic bond through opposite attraction. Question 4 (1 point) Dangers in your home: knowing how to handle household products containing hazardous materials or chemicals can reduce the risk of injury. It is important to store household chemicals where children cannot access them. Remember that common 30 G A DI F3 ES F7 & W# N 4 5 6 V 8 W E R T Y Uch: Attempt 1 Question 4 (1 point) Dangers in your home: knowing how to handle household products containing hazardous materials or chemicals can reduce the risk of injury. It is important to store household chemicals where children cannot access them. Remember that common products such as aerosol cans of hair spray and deodorant, nail polish and nail polish remover, toilet bowl cleaners and furniture polishes are hazardous materials. Sometimes using these products incorrectly can result in a dangerous situation. Many household cleaners, particularly toilet cleaners and some drain cleaners have acid in them. This is the equation representing hydrochloric acid plus bleach. NaCIO + 2 HCI- Cl2 + H20 + Nacl Imagine you have just mixed the two seemingly non-toxic products, toilet bowl cleaner and bleach to do a really thorough job in your bathroom. All of a sudden you feel dizzy and your eyes and nose are burning. Explain what has happened. By mixing the two, the chemical reaction released a product that is potentially toxic: chlorine gas. A chemical reaction occurred and you released sodium chloride into the air that caused your dizziness. When the NaCIO decomposes during mixing, the excess oxygen in the air will produce dizziness. You mixed the products in a confined space and there is not much oxygen left to breathe. Question 5 (1 point) 30 F1 F2 F3 FA Co @ # 8 2 3 4 5 6 V W E R T Y UBy mixing the two, the chemical reaction released a product that is potentially toxic: chlorine gas. A chemical reaction occurred and you released sodium chloride into the air that caused your dizziness. When the NaCIO decomposes during mixing, the excess oxygen in the air will produce dizziness. You mixed the products in a confined space and there is not much oxygen left to breathe. Question 5 (1 point) What does a chemical change always result in? new substance increased activation energy new reactant precipitate Question 6 (5 points) Periodic Table of the Elements H MA He BCNO F Ne Li Be Symbol Name Al Si P Na Mg - vis - 38 21 24 60 TI "V Cr Mn Co Cu Zn Ga Ge As "so Br K Ca Sc " Sr Nb Mo Tc Ru F Rh Pd Ag Cd In Sn sb To Rb 57-71 "w Be Ph " BL "Po DII 30 F2 F3 EA F5 Co $ o 6 V 8 O 2 4 5 Y U W E R TQuestion 6 (5 points) Periodic Table of the Elements He H NA Symbol B C O F Ne Li Be 10811 12011 14 007 15:575 do12 Al Si P S "CI Ar Na Mg 26 982 28 086 20.974 32 065 22.930 24 305 K Ca Sc "Cr Mn "Fe Co Ni Cu Zn Ga Ge As S Br Kr 85.39 69732 72.61 74 822 78 09 Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te 1 Xe Rb Sr 101.07 102 906 16042 107 048 912417 14878 11271 121.706 1276 120 POM 57:71 Ta W Re Os "Ir Pt Au Hg TI Pb Bi Po At Rn Cs Ba Hf 2572 201 930 209 957 272018 137 307 69-103 Fr Ra Rf sg Bh Hs "Mt "Ds Rg Cn Uut FI Uup Lv Uus Uuo Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu La 173 04 174.957 129 904 140 715 140 809 14424 144 912 150.20 151 904 13723 158 825 162.50 164 920 16720 Ac Th Pa U Np Pu Am Cm BK Cf Es Fm Md No L 237 821 712031 231034 234 029 237 048 241084 243 061 247070 247.070 251 080 2341 257.095 254.1 258.101 12627 Transition Actinide Metal Use the periodic table to help you identify the number of valence electrons for each of these elements. 1. 1 Carbon (C) 2. 2 3. 3 Calcium (Ca) 4. 4 Oxygen (0) 15 Chlorine (CI) AA SII 20 a F7 :9 F1 F3 @ 6 8 4 5 2 Y U Q W E R TCe Nd Pm Dy Yb Pr Ho Er Tm La Sm Eu Gd 157 25 102 103 Np Pu Am Cm BK Cf Es Fm Md No Lr Ac Th Pa 27.925 259.101 231.634 243 0841 247 070 247 070 ARa ransis clinide Use the periodic table to help you identify the number of valence electrons for each of these elements. 1. 1 Carbon (C) 2. 2 3. 3 Calcium (Ca) 4. 4 Oxygen (0) 5. 5 Chlorine (CI) 6. 6 Neon (Ne) 7. 7 8. 8