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Draw the orbital diagram for iron.
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- Look at the locations of potassium andcalcium on the periodic table. Form a hypothesis toexplain why the melting point of calcium is considerablyhigher than the melting point of potassium.(ii) Table 1 shows the atomic numbers and melting points of the elements in group 7. group 7 atomic number melting point (°C) fluorine 9. -220 chlorine 17 -101 bromine 35 -7 iodine 53 114 astatine 85 302 Table 1 Explain why the melting point increases as the atomic number increases.Do the alkaline earth metals tend to gain or lose electrons in chemical reactions? How many?
- Write the balanced chemical equation for the reaction of solid strontium with iodine gas.Use the electron configurations of the alkaline earth metalsto explain why they tend to form 2+ ions.1. Write the electron configuration (s, p, d) including all the orbitals, of an argon atom in its ground state. 2. A 500 mL sample of swimming pool water contained 0.11 g of dissolved solids. Express this concentration in parts per million (p.p.m.).
- Write the complete electron configuration for iron and draw the energy level diagram. Explain how iron is able to form a +2 and +3 cation.Give the valance electron configuration for Niobium.Write and balance the reaction of calcium carbonate with stomach acid. Include states or phases. This reaction happens in equilibrium.