Which pair of atoms has the highest electronegativity difference? (Calcium's electronegativity is 1.0 Fluorine's electronegativity is 4.0 Hydrogen's electronegativity is 2.2 Sodium's electronegativity is 0.93)
A man was murdered in his office. The suspects are Ericson, Maggi, Joel, Benny, Sona, Patick. A calendar found near the man has blood written 6, 4, 9, 10, 11. Who is the killer?