Which pattern in electronegativity do elements in the periodic table display?
A. Electronegativity decreases from left to right within a row of the periodic table
B. Electronegativity is highest on the left and right sides of the periodic table, and lowest in the middle of a row.
C. Electronegativity increases from left to right within a row of the periodic table.
D. Electronegativity is lowest on the left and right sides of the periodic table, and highest in the middle of a row.