Drag each tile to the correct box. Arrange the elements in order of increasing atomic radius. Use the periodic table to help you.
Mg
Ba
F
S
$\square < \square < \square < \square$
Answer (2)
Atomic radius increases down a group and decreases across a period.
Barium (Ba) is larger than Magnesium (Mg), and Sulfur (S) is larger than Fluorine (F).
Magnesium (Mg) is larger than Sulfur (S).
The order of increasing atomic radius is F < S < M g < B a .
Explanation
Problem Analysis We need to arrange the elements Mg, Ba, F, and S in order of increasing atomic radius using the periodic table.
Periodic Trends Atomic radius generally increases as you move down a group (column) and decreases as you move from right to left across a period (row) in the periodic table.
Element Comparisons
Magnesium (Mg) and Barium (Ba): Ba is located below Mg in Group 2. Therefore, Ba has a larger atomic radius than Mg.
Fluorine (F) and Sulfur (S): S is located below F in Group 16. Therefore, S has a larger atomic radius than F.
Magnesium (Mg) and Sulfur (S): Mg is located to the left of S in Period 3. Therefore, Mg has a larger atomic radius than S.
Determining the Order Combining these relationships, we get the order of increasing atomic radius: F < S < Mg < Ba.
Final Answer The elements arranged in order of increasing atomic radius are: F, S, Mg, Ba.
Examples
Understanding atomic radius trends helps predict chemical reactivity. For example, in designing batteries, knowing the atomic size influences how easily ions move through a material. Similarly, in environmental science, the size of atoms affects how pollutants interact with soil and water. This concept is crucial in many fields, from materials science to environmental remediation, allowing us to engineer better technologies and understand natural processes more effectively.
The elements arranged in order of increasing atomic radius are Fluorine (F), Sulfur (S), Magnesium (Mg), and Barium (Ba). This order is determined by understanding periodic trends where atomic radii increase down a group and decrease across a period. Therefore, the final order is F < S < Mg < Ba.
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