Final answer:
The correct order of electronegativity from least to most is calcium (Ca), beryllium (Be), carbon (C), and nitrogen (N), as electronegativity increases from lower left to the upper right of the periodic table.
Step-by-step explanation:
The proper order of electronegativity for the elements calcium (Ca), beryllium (Be), carbon (C), and nitrogen (N) can be determined by their positions on the periodic table. Electronegativity increases from bottom left to upper right on the periodic table, and because nitrogen is furthest to the upper right among these elements, it has the highest electronegativity. Following this trend:
- Calcium (Ca)
- Beryllium (Be)
- Carbon (C)
- Nitrogen (N)
Therefore, the correct order from least electronegative to most electronegative is Ca < Be < C < N.