Complete each statement below by choosing a term from the following list. Terms may be used more than once. main-group elements halogens metals transition metals alkaline earth metals alkali metals hydrogen noble gases
The have a single electron in the highest occupied energy level.
The are in the s- and p-blocks of the periodic table.
All the have two valence electrons and get to a stable electron configuration by losing two electrons.
Unlike the main-group elements, each group of the does not have the identical outer electron configuration.
The , the most reactive group of non-metals, achieve stable electron configurations by gaining one electron.
The have a full set of electrons in their outermost energy level.
The are very stable and have low reactivity.
The are highly reactive and readily form salts with metals.
In general, the are metals that are less reactive than the alkali metals and the alkaline earth metals.
The are metals that lose one electron when they react with water to form alkaline solutions.
Most elements are .
With its one valence electron, reacts with many other elements.