Question

determine the location of the elements on the periodic table with the largest ionization energy.
i need a hint
the elements with a large ionization energy are all in period 7 (the row at the bottom of the periodic table).
the elements with a large ionization energy are all in period 1 (the row at the top of the periodic table).
the elements with a large ionization energy are all in group 1 (the column at the left of the periodic table).
the elements with a large ionization energy are all in group 18 (the column at the right of the periodic table).

Explanation:

Ionization energy is the energy required to remove an electron from an atom. In the periodic table, ionization energy generally increases across a period (from left to right) and decreases down a group. Group 18 (noble gases) have full - filled valence electron shells, which makes it very difficult to remove an electron. Period 1 has only two elements (H and He). He is in group 18 and has a high ionization energy, but H (in group 1) has a relatively low ionization energy compared to most non - metals. Period 7 elements are mostly metals or radioactive elements with lower ionization energies (except for the noble gas in period 7, but group 18 as a whole has a trend of high ionization energy across periods). Group 1 elements are alkali metals with low ionization energies as they tend to lose electrons easily.

Answer:

The elements with a large ionization energy are all in group 18 (the column at the right of the periodic table).