Give the symbol of the element that has the (4.7)

a. largest ato...

Question

Give the symbol of the element that has the (4.7)

a. largest atomic size in Group 1A (1)

Accepted Answer

Welcome back, everyone. We need to identify the group two A element with the smallest atomic size from the following elements. Choice A states. Hydrogen B helium C beri and D radon. We're going to begin by recalling our trend on our periodic tables for increasing atomic radius. And we're going to recall that atomic radius increases as we go towards the bottom left of our periodic tables. Now let's go ahead and note down the location for each of our listed atoms beginning with hydrogen. We want to recall that it's located in group one A where recall that the group numbers are the columns going down our periodic table and hydrogen is located across period one and recall that period numbers are the rows going across our periodic table. So this is our location for hydrogen next across period one. But in group eight A, our noble gas group, we have our atom helium. Next, we have barium, which we should recall is located in group two a across period two. And lastly, we have radon, which is also a group two A element but is located across period seven. Now, with our locations of our atoms outlined based on our atomic radius trend, we would observe that helium being being farthest to the right in group eight A has the smallest atomic size where hydrogen being further to the left in group one A has a larger atomic size than helium. However, barium being further towards the bottom of our periodic table across period two, we would observe has a larger atomic radius than hydrogen. And then we have radon which is even more towards the bottom than barium across period seven, which has the largest atomic radius. Now note that we stated hydrogen is located in group one A and helium is located in group eight A. So we would rule out choices A and B because we only want to select the group two A element with the smallest atomic size. So that leaves us with choice C and D where for choice C, we have barium and recall that beri is indeed a group two A element and is located across period two corresponding to a smaller radius in comparison to radon, which is across period seven and we stated would have the largest atomic radius. So because radon has the largest, because it's a period seven element has the largest radius, we would rule out choice D. And that leaves us with choice C as our only correct choice being our answer for beryllium as the group two A element with the smallest atomic size. So I hope that this made sense. And let us know if you have any questions.

Give the symbol of the element that has the (4.7) a. largest atomic size in Group 1A (1)

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