Question

based on periodic trends, rank the elements in order of increasing electronegativity: c, h, li, n

Explanation:

Step1: Recall periodic trend

Electronegativity increases left→right across a period, decreases top→bottom in a group.

Step2: Locate elements in periodic table

Li (Group 1, Period 2), H (Group 1, Period 1), C (Group 14, Period 2), N (Group 15, Period 2).

Step3: Apply trend to Period 2

Li (leftmost) < C < N (rightmost in Period 2).

Step4: Compare H and Li (Group 1)

H (Period 1) > Li (Period 2, lower in group).

Answer:

Li < H < C < N