Answer: The difference between the electronegativity or (∆EN) of two different atoms indicates the type of bond created.
Explanation: For ionic bond compounds the difference between their electronegativity is 1.7 or greater. Covalent bond compounds have a difference of 0.4 but not greater than 1.7 on their electronegativity.
If they are in the same row they have the same number of outer electrons on the same main shell also known as valence electrons
if they are in the same column they have the same number of valence electrons but on different main shells
Different fabrics rub together, and electrons may rub off
