how to use the periodic table to predict and compare ionization energies, chemistry homework help

Please answer this 3 questions in easy way, clear and not plagarism

Thanks

1. In your own words, explain how to use the periodic table to predict and compare ionization energies
2. What is the electron configuration of an electrically neutral atom of magnesium?
3. Look at the positions of lithium, sodium, and potassium on the periodic table. Based on their locations, predict how many valence electrons these elements have and predict what the reactivity of these elements will generally be.