Question

opic worksheet Electron Configuration and Periodic Table (c) Consider the process of removing electron from Na atom as written by Na (g)-→ Na"(g) + e, (g) How do you predict the sign of energy change during the process? Do you need to supply energy or will release energy during the change? the system (d) After you remove the 1" electron from Na atom, if you are going to remove the second electron, which orbital this second electron would be in before you remove it? How do you predict the energy required to remove the second electron (called second lonization energy lu) compare with the energy need to remove the first electron (called first ionization energy, I)?-(concept of valence electrons and core electrons) 3. Let's consider how the first ionization energy , changes for elements in the same group (a) Co of increasing atomic radius mpare Li, Na, K atoms, recall how their atomic sizes compare with each other. Arrange them in the order b) How would you predict I, for these elements compare with each other? What is the main reasoning that you have used to reach that conclusion? 4. Let's compare how the first ionization energy h changes for elements in the same period. (a) What orbitals are the electrons in for Liand Be when we remove the first electron? (b) Do you expect the i, for Li and Be be the same or different? if different, why and which one is lower?

Answer 1