transparent material. The addition of metal oxides alters the color of the resulting glass. Beta-titanium is composed primarily of titanium and heat-treated with a mix of metals such as aluminum and vanadium. The resulting material has high strength and corrosion resistance, and is used in dental implants and aircraft parts. • Iron (II) sulfide is formed by heating metallic iron and elemental sulfur. This results in the formation of a non-magnetic all-black mineral. Given the three statements above, which of the following is TRUE? ● Select one: a. Only one material is classified as a homogeneous mixture. O b. Only one material is classified as a pure substance. O c. All materials are classified as homogeneous mixturen 2

Consider the following data for nickel: g 58.693 mol atomic mass electronegativity 1.91 kJ 112. mol electron affinity kJ 737.1 mol ionization energy kJ 17.2 mol heat of fusion You may find additional useful data in the ALEKS Data tab. Does the following reaction absorb or release energy? release absorb (1) Ni(g) + e → Ni (g) Can't be decided with the data given. Is it possible to calculate the amount of energy absorbed or released by reaction (1) using only the data above? yes no If you answered yes to the previous question, enter the I kJ/mol amount of energy absorbed or released by reaction (1): Does the following reaction absorb or release energy? release absorb (2) Ni(g) → Ni (g) + e Can't be decided with the data given. yes Is it possible to calculate the amount of energy absorbed or released by reaction (2) using only the data above? no If you answered yes to the previous question, enter the amount of energy absorbed or released by reaction (2): O kJ/mol

17. Write the ground state electron configuration for each atom and ion pair. a. Ni, Ni+ c. Y, Y* b. Mn, Mn* d. Ta, Ta

would you predict that Sc is metallic? Explain the basis for your predicition by using what you know about its location in the Periodic Table.

Explain the advantages and disadvantages of electron impact ion Soures (EIS)

1) Can you use the aforementioned periodic trends (Oxidation number,Ionization energy,Electronic affinity and Electronegativity (Pauling and Allred-Rochow)) to predict the order of decreasing activity of the elements Ag, Al, Ca, Cu, Hg, Mg, Mn, Na, Ni, Pb, and Zn? By what or why not?2) How do you think the activity of an element should be related to its first potential ionization? Consult a table of ionization potential values ​ and predict an order decreasing reactivity of the previous elements3) How do you think the Pauling electronegativity of an element will be related to its exercise? Predict a decreasing order of reactivity of the above elements based on their Pauling electronegativities.