posted by johnny .
I don't understand this paragraph, can anyone explain it to me?
If a large amount of energy is needed to remove an electron from an atom, the arrangement of electrons in that atom is considered to be especially stable. Thus, a high first ionization energy must be supplied to remove an electron from an atom and that the electron arrangement in that atom is especially stable. Any element that has a larger first ionization energy than it's neighboring elements has an electron arrangement in its atoms that is more stable than its neighboring elements.
The simplfied steps that an atom must go through to form a compound include the first step of ionizing the last outer shell electron. An atom that loses the outside electron easily has a low ionization potential; that makes it easy for ami element, for example, to become a positively charged ion where it can react with a negatively charged to form a compound. A neighboring element that has a lower first ionization potential (the voltage necessary to remove the FIRST electron) forms the ion easier and that makes it easier to form compounds. A neighboring element that has a higher first ionization potential forms the ion with more difficulty and that makes forming a compound harder. I hope this helps.