Lesson 5.7 Ionization Energy and Effective Nuclear Charge

Which element has the highest ionization energy?

Which group of elements is always found as positive elements. Use evidence from the image to explain your answer!

Which group of elements is the group that is always found as negative ions? When thinking about your answer be sure to consider that the noble gases (He, Ne, ..... Radon) do not make ions. Use evidence from the image to justify your answer!

The rules that the article discusses are called trends because there are elements that don't follow the pattern that ionization energy increases as go from left to right and decreases and you move down a column. Look carefully and find at least two elements that violate the rules. What are the elements and where are they in the periodic table?

What is ionization energy?

What type of electron is removed during ionization?

A group is

You can use the periodic table to figure out the number of core electrons for the first 56 element by

The distance between the nucleus and the valence electrons is larger in potassium because

Coulombic attraction is stronger when the proton and the electron are closer.

Coulombic attraction between the valence electron and the nucleus depends in potassium is reduced because

The shield effect refers to

The effective nuclear charge of sulfur is

The effective nuclear charge of calcium is

Why does the shield effect increase as atoms get larger?

Why does shielding not increase across a period?

Which element has the highest effective charge nuclear charge in period 2?

Which element in period 2 is most likely to be found as a positive ion?

Which element in period 2 is most likely to be found as a negative ion?