39. Solving a chemistry problem

1. Set the composition of the atom: the number of protons (nuclear charge), neutrons, electrons.
2. Write down the electronic formula of the atom, indicate the external electronic level and the orbital to which the last electron goes. Infer the element´s type. Draw the electron structural formula of the valence level.
3. Using the electronic formula, determine the position of the element in the periodic system of D.I. Mendeleev.
4. Determine the possible values of the oxidation states. Specify the most stable oxidation states for this element. Give examples of compounds of this element in these oxidation states.
5. Based on the electronic formula, determine the nature of the properties of a simple substance (metal / non-metal). Describe the physical properties of a simple substance. Give the reaction equations characterizing the chemical properties of a simple substance.
6. Write down the formulas and give the reaction equations that characterize the chemical properties of the characteristic compounds: higher oxide and higher hydroxide.
7. Make a conclusion about the reasons for the similarities and differences of the proposed elements.
Molybdenum and tellurium elements