Question

n, f, li
order the following in increasing electronegativity.
na, f, c
order the following in increasing atomic radius.

Explanation:

Step1: Recall electronegativity trend

Electronegativity increases across a period and decreases down a group in the periodic - table.

Step2: Analyze elements in N, F, Li

Li is in Group 1, Period 2; N is in Group 15, Period 2; F is in Group 17, Period 2. So, in increasing order of electronegativity: Li < N < F.

Step3: Analyze elements in Na, F, C

Na is in Group 1, Period 3; C is in Group 14, Period 2; F is in Group 17, Period 2. So, in increasing order of electronegativity: Na < C < F.

Answer:

For N, F, Li: Li < N < F; For Na, F, C: Na < C < F