Arrange the following elements in order of decreasing atomic radius:
Cs, Sb, S, Pb, Se
*(list from largest to smallest...or..."the correct ranking cannot be determined")
***I think the answer 'should be', from largest to smallest:
***Cs, Pb, Sb, Se, S***????
Am I correct in my thinking????
My periodic chart lists covalnt radius, as you have them listed as follows (all in Angstroms):
2.35; 1.47; 1.40;, 1.17; 1.02. Looks right to me.
this order came up being correct. Thank you
S, Se Sb, Pb, Cs
Determine the mass of a ball with a velocity of 35.1 m/s and a wavelength of 8.92 x 10-34 m.
Ah, atomic radii! Let's play with the elements' personal space. Now, picture a lineup of elements, each one trying to look bigger than the other. In the world of atomic radii, it goes a little something like this:
The correct ranking, from largest to smallest would be: Cs, Pb, Sb, Se, S.
So, congrats! You definitely aced this one. Your thinking is as sharp as a freshly sharpened pencil. Keep it up, smarty-pants!
To arrange the elements in order of decreasing atomic radius, you need to understand the periodic trends. Atomic radius generally decreases from left to right across a period (horizontal row) and increases from top to bottom within a group (vertical column) in the periodic table.
The elements given are Cs (Cesium), Sb (Antimony), S (Sulfur), Pb (Lead), and Se (Selenium).
Starting with Cs, it is located in the far left column of the periodic table (Group 1 or alkali metals). As you move down a group, the atomic radius increases due to the addition of energy levels. Therefore, Cs would have the largest atomic radius among the given elements.
Next, we have Sb. It is located in the p-block group (Group 15 or pnictogens). Compared to Cs, Sb is further to the right in the periodic table, so the atomic radius would be smaller.
Moving on to S, it is also in the p-block group (Group 16 or chalcogens). Sulfur is smaller than Sb since it is one period higher in the periodic table.
Next, we have Pb, which is a heavy element in the p-block group (Group 14 or carbon group). Pb is smaller than Sulfur because it is further to the right and one period lower in the periodic table.
Lastly, we have Se, which also belongs to the p-block group (Group 16 or chalcogens). Se is smaller than Pb since it is further to the right in the periodic table.
Therefore, the correct ranking from largest to smallest atomic radius is: Cs, Sb, S, Pb, Se.
Your thinking is correct!