arrange Li, Cl, and Al in increasing atomic radius.
is the correct answer Cl<Al<Li?
look at the atomic numbers ... in general, bigger number means bigger radius
oops ... my bad ... got it backwards
you are correct
Yes, the correct answer is Cl < Al < Li. This is because atomic radius generally increases down a group and decreases across a period in the periodic table.
To determine the correct order of atomic radius for Li, Cl, and Al, you can refer to the periodic table.
1. Locate Li, Cl, and Al on the periodic table.
2. Li is in group 1 and period 2, Cl is in group 17 and period 3, and Al is in group 13 and period 3.
3. Since these elements are all in the same period, we can compare their atomic radii by looking at the group number.
4. Li is in group 1, Cl is in group 17, and Al is in group 13.
5. As we move down a group, the atomic radius increases, so Li will have the largest atomic radius.
6. As we move from group 1 to group 17, the atomic radius generally decreases, so Cl will have a smaller atomic radius compared to Li.
7. Lastly, Al is in group 13, which is between the Li and Cl groups. Therefore, Al will have an atomic radius larger than Cl but smaller than Li.
Hence, the correct order of atomic radius for Li, Cl, and Al is Cl < Al < Li.