Rank these elements in terms of increasing atomic radius AI, F, Sr, N, Cs
To rank these elements in terms of increasing atomic radius, we need to consider their positions on the periodic table. Atomic radius generally increases as you move down a group (vertical column) and decreases as you move across a period (horizontal row) from left to right.
1. F (Fluorine) - Fluorine is in the 7th period and belongs to Group 17 (halogens). Since it is on the right side of the periodic table, it has the smallest atomic radius among these elements.
2. AI (Aluminum) - I assume you meant Al instead of AI. Aluminum is in the 3rd period and belongs to Group 13 (boron group). It has a larger atomic radius compared to Fluorine as it is one period below.
3. N (Nitrogen) - Nitrogen is in the 2nd period and belongs to Group 15 (nitrogen group). It has a larger atomic radius compared to Aluminum as it is one period below.
4. Sr (Strontium) - Strontium is in the 5th period and belongs to Group 2 (alkaline earth metals). It has a larger atomic radius compared to Nitrogen as it is one period below.
5. Cs (Cesium) - Cesium is in the 6th period and belongs to Group 1 (alkali metals). It has the largest atomic radius among these elements due to its position at the bottom left of the periodic table.
Therefore, the ranking of these elements in terms of increasing atomic radius is: F, Al, N, Sr, Cs.
To rank these elements in terms of increasing atomic radius (from smallest to largest), we need to understand periodic trends and the factors that affect atomic size. Atomic radius generally increases as you move down a group (vertical) and decreases as you move across a period (horizontal) in the periodic table.
Let's analyze each element:
1. AI (Aluminum): Located in period 3, aluminum has 13 protons in its nucleus. Moving across a period, the atomic radius tends to decrease. Therefore, aluminum has a smaller atomic radius compared to the other elements mentioned.
2. F (Fluorine): Fluorine belongs to Group 17 (halogens) in period 2. Fluorine has 9 protons, making it smaller than aluminum (AI). It is smaller because moving from left to right across a period, atomic radius generally decreases.
3. Sr (Strontium): Strontium is in Group 2 (alkaline earth metals) and is located in period 5. Compared to AI and F, strontium has a larger atomic radius since it is in a lower period and has more energy levels and electron shielding.
4. N (Nitrogen): Nitrogen is in Group 15 (pnictogens) and belongs to period 2. It has 7 protons and is smaller in size compared to strontium since it has fewer energy levels and less electron shielding.
5. Cs (Cesium): Cesium is located in Group 1 (alkali metals) and period 6. It has the largest atomic radius among the listed elements due to having the most energy levels and electron shielding. Therefore, cesium has the largest atomic radius.
Ranking these elements from smallest to largest atomic radius, we get:
AI < F < N < Sr < Cs