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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.

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

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.

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