I'm sure it is water or carboxylic
Answer: <em>The </em><em>alkali metals</em><em> reactivity is generally higher than the alkaline earth metals. </em>
Explanation: <em>This makes the alkaline earth metals with their two valence electrons less reactive than alkali metals with their one valence electron.</em>
<u>Alkali metals is ns1 and alkaline earth metals is ns2</u>
Well, both fossils and preserved remains retain the shape and form of the remains, but fossils do not actually retain the matter that made up the remains, instead, bones and tissues (usually just bones) have been replaced with stone.