An ability for an atom to attract electrons is known

While a covalent bond is relevant here since it involves sharing electrons between two atoms, I suspect you are talking about electronegativity. Electronegativity is the measure of a particular element's general affinity to attract a negative charge (i.e. electrons) towards its nucleus.

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.