Question
Rank the three elements according to their atomic radius, from largest to smallest: Beryllium (Be), Carbon (C),Oxygen (O) Tap the fields to rank the elements in terms of atomic radius (R). square square square Largest R Middlest R Smallest R
Answer
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(260 Votes)
Yara
Elite · Tutor for 8 years
Answer
Largest R: Beryllium (Be)Middlest R: Carbon (C)Smallest R: Oxygen (O)
Explanation
To rank the atomic radii of Beryllium (Be), Carbon (C), and Oxygen (O) from largest to smallest, we need to consider their positions in the periodic table and the general trends in atomic size.1. **Periodic Table Position**: Beryllium (Be), Carbon (C), and Oxygen (O) are all located in the second period of the periodic table. Beryllium is in Group 2, Carbon in Group 14, and Oxygen in Group 16.2. **Atomic Radius Trend Across a Period**: As we move across a period in the periodic table from left to right, the atomic radius decreases. This is because, while the electrons are being added to the same shell, the number of protons in the nucleus increases, resulting in a greater effective nuclear charge. This increased nuclear charge pulls the electron cloud closer to the nucleus, thus reducing the atomic radius.3. **Order of Atomic Radii**: Based on the above trend, Beryllium (Be), which is furthest to the left, will have the largest atomic radius. Carbon (C) comes next, and Oxygen (O), being furthest to the right, will have the smallest atomic radius.Therefore, the order from largest to smallest atomic radius is Beryllium (Be) > Carbon (C) > Oxygen (O).