As you go from left to right across the periodic table what is the general trend that is observed for each of the following For electron affinity assume that it is defined as the change associated with the addition of an electron to a gas-phase atom. 1. Effective Nuclear Charge  blank 2. Atomic Radii  blank 3. Ionization Energy  blank 4. Electron Affinity  blank As you go down a column in the periodic table what is the general trend that is observed for each of the following.   5. Effective Nuclear Charge  blank 6. Atomic Radii  blank 7. Ionization Energy  blank 8. Electron Affinity

Write the electron configurations for the elements below.  1.Magnesium  2.Calcium  3.Rubidium

this question has two parts A and B. Part A: How does atomic radius change going down the group and why? Decreases because there are less energy levels decreases because the nucleus is stronger Increases because more energy levels are being added down the group Increases because the nucleus is weaker Part B: How does atomic radius change moving across the period? Increases because there are more energy levels Increases because the nucleus is less efficient (weaker) Decreases because the nucleus is stronger and more efficient Decreases because there are less energy levels