Question

order the following in increasing atomic radius: o, li, c
order the following in increasing 1st ionization energy. o, li, c

Explanation:

Step1: Recall atomic - radius trend

Atomic radius decreases across a period from left - to - right. Li, C, and O are in the same period (second period). Li is in group 1, C is in group 14, and O is in group 16.

Step2: Order by atomic radius

Based on the trend, the order of increasing atomic radius is O < C < Li.

Step3: Recall ionization - energy trend

First ionization energy increases across a period from left - to - right. This is because the effective nuclear charge increases and the atomic radius decreases, making it harder to remove an electron.

Step4: Order by ionization energy

Based on the trend, the order of increasing first ionization energy is Li < C < O.

Answer:

Increasing atomic radius: O, C, Li
Increasing first ionization energy: Li, C, O