Which of the following three spheres represents a Ca atom, which an Sr atom, and which a Br atom?

Video transcript

welcome back everyone. We need to match each element with the correct sphere below. So we are given are three elements as aluminum, carbon and cesium. And we are given the radius of each of our different atomic sizes for the unknown Adams pictured below. Now, if we recall our trend on our periodic table for atomic radius, we would recall that atomic radius is going to be increasing as we go towards the bottom left of our periodic table. So considering our atoms and their locations, we would find carbon On our periodic table located in Group four A. So carbon would be somewhere around here on our periodic table, which would correspond to a Doly small atomic radius based on our trend. Because carbon also, to be more specific, is located across period two. Now next we have aluminum. Where on our periodic table we would find aluminum located in group three a. Which also lies. Well rather this time lies across period three on our periodic table. And so aluminum would be one level down from carbon and to the left, meaning it has likely a larger atomic radius because it's further to the left based on our trend. And so that leaves us with cesium. To compare now where we would find Sissy. Um on our periodic table located in group one A which we would recognize lies across period six. And because we find Sissy um in Group one, a Lying Cross period six, we would find cesium somewhere around here on our periodic table and that would be the most to the left and bottom most of our periodic table compared to aluminum and carbon, which are further to the right and more upward on our periodic table. So cesium is the atom out of the three given from the prompt which honors our trend for increasing atomic radius the most. So we would associate cesium as having the largest radius And so based on our illustrations, we can designate the radius of m to our atom of cesium. We're going to designate our radius of 125 m to our atom of aluminum and then we can designate our radius of 70 PK meters to our atom of carbon. So to be more specific for our final answer, we're going to say that our blue sphere represents our atom of aluminum represented by choice a hour. Red sphere represented by choice B represents our carbon atom and then our black sphere represented by choice C. Represents our atom of cesium. So what's highlighted in yellow represents our three final answers to complete this example as each element with its correct corresponding sphere based on the given radian. The prompt. I hope that everything I explained was clear. If you have any questions, please leave them down below and I'll see everyone in the next practice video