List three balanced chemical equations that include your element, include all states of matter.

Please answer each question. Selenium

1. Discuss the following Periodic Trends for the element’s group: Zeff, Atomic Radius, Ionization Energy,
2. Give names and chemical formulas for five compounds in which this element exists. For these compounds, list the molar mass, the percent composition of each element, classify as ionic or covalent, and draw the Lewis Dot structure.
3. List three balanced chemical equations that include your element, include all states of matter.
a. Describe why the reaction is significant? What are the uses of the products of the reaction?
b. For one of the reactions, write your own stoichiometry problem and solve it.
4. What is the specific heat of your element in its most stable state at room temperature? Calculate the energy required to heat 25.0 g of the element from 0oC to 50oC (remember to account for ΔHvap or ΔHfus if there is a phase change).