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Sagot :

Answer:

c. They have similar chemical properties.

Explanation:

Elements in a group (column) of the periodic table will all have the same number of valence electrons. Valence electrons determine a number of an element's chemical properties, which means that elements in the same group will have similar properties. For example, the alkali metals of Group One all have one valence electron and are highly reactive.

Answer:

C they have the same electrons because they are the same organism