Question

choose the elements magnesium (mg) and strontium (sr) from period 2. look at the side - by - side comparison. which element has the larger atomic radius? magnesium strontium question 5 1 pts reset the simulation (see directions between questions 3 and 4 if you need help). choose the elements boron (b) and oxygen (o) from period 2 of the periodic table. look at the side - by - side comparison. which element has a larger atomic radius? boron oxygen

Explanation:

Atomic radius generally decreases across a period from left - to - right due to increasing nuclear charge pulling electrons closer. Magnesium and strontium: Strontium is in a lower period (period 5) compared to magnesium (period 3), and atomic radius increases down a group, so strontium has a larger atomic radius. For boron and oxygen in period 2, boron is to the left of oxygen, so boron has a larger atomic radius.

Answer:

First question: B. Strontium
Second question: A. Boron