The atomic radius of an element is the average distance from the nucleus to the outermost shell. Anonymous. These 3 elements belong to the same period (row) with Ne having 1 more proton ( and electron) than F, which itself has one more proton ( and electron) than O. Not Sure About the Answer? Elements in the same family have the same number of valence electrons? Answer and Explanation: When ranking the size of atoms of different elements, the most important factor is the number of energy levels. 8 years ago. (S) Sulfur would be the largest with Na being the smallest. You can identify the elements from the number of electrons they have. Answer Save. If you look at the table, you can see there is a clear trend in atomic radius. However, this assumes the atom to exhibit a spherical shape, which is only obeyed for atoms in vacuum or free space. e) Group 3A(13) element that forms the most basic oxide. Answer. 9. Oxygen has the smallest atomic radius. Sodium (Na), magnesium (Mg), silicon (Si) and phosphorus (P) all belong to the third period. Select one: o lodine (1) Tin (Sn) Strontium (Sr) Technetium (Te) From the elements listed below which element has the largest 1st ionisation energy? As you go across the periodic table from left to right, the atomic radius decreases. The element that is considered to have the smallest atomic radius is helium. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. It is fairly obvious that the atoms get bigger as you go down groups. Favourite answer. Helium has the smallest atomic radius at 31 picometers. Ca2+ has the smallest radius. Which of the following statements relating to … There you would find Na 186, Mg 160, Si 117, P 110 and Cl 99 pm. (Note: this is an exception to the general trend - see notes- you may be responsible for this.) Atoms with 37 to 86 Electrons”. (e) Name one metal, one non-metal and a metalloid out of these elements. --an anion that has a smaller radius. Atomic radius or radii is a set of average bonding radii which determined from measurements on a large number of elements and compounds. So, all these elements belong to the 4 t h group and Kr has the smallest atomic radii as it lies across the period. e) Group 3A(13) element that forms the most basic oxide. 44% average accuracy. So it's going to have a larger at Tom. since they are all in the same column then the one at the top is smallest and that is (A) Source(s): Soc. What functional group(s) is/are found in hex-2-enal ? The other elements in the p-block of the periodic table also have small atomic radii, but helium is the smallest. So Element A would be beryllium, Element B is sulphur, and so on. Which element among the Lanthanides has the smallest atomic radius ? Could easily be answered by looking up wikipedia “atomic radius” or similar. Ions are charged particles, and atoms become charged particles when they gain or lose electrons. a. Atoms only gain or lose electrons in an attempt to establish an octet, or 8 valence electrons.Octets are particularly stable electron arrangements. 8 years ago. Which periodic group has the smallest atomic radius? Trends in atomic radius in Periods 2 and 3. This direction increases the size of the atom. b) Highest IE1 in Group (4A)14. carbon. Oxygen, at 0.650 has the smallest atomic radius of the elements listed. Lutetium is the last element of … Which element has the smallest atomic radius? As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. A large a smaller atomic radius. Check Answer and Solution for above questio. From there, you can use their positions on the periodic table to help you estimate their atomic radii. Answer. Halogens. Save. What element has the smallest atomic radius. Remember, atomic radius increases towards the left and down on pier table. Helium is in the top period and the farthest right group, which follows the patterns of atomic radius on the periodic table. Helium is therefore the smallest element, and francium is the largest. for the mcq Which element among the lanthanides has the smallest atomic radius When the atomic radius is larger, it means the atom is larger. DRAFT. As you move down an element group (column), the size of atoms increases. Cl- is next, it gained an electron so 18 electrons pulling on 17protons. If you look at the table, you can see there is a clear trend in atomic radius. Van der Waals radius. See the site listed in sources. Which atom has the smallest atomic radius?-Br Ga Rb K 2. Atomic radii vary in a predictable way across the periodic table. Free Printable Periodic Tables (PDF and PNG), Today In Science History – November 1 – Operation Ivy Mike, List of Electron Configurations of Elements, What Is a Heterogeneous Mixture? Trends in atomic radius down a group. 7 people answered this MCQ question Lutetium is the answer among Cerium,Lutetium,Europium,Gadolinium. Relevance. What did the blank spaces in the Mendeleevs periodic table represent? Find an answer to your question “What element has the smallest atomic radius ...” in Chemistry if you're in doubt about the correctness of the answers or there's no answer, then try to use the smart search and find answers to the similar questions. Relevance. Which atom has the largest atomic radius?-K Rb Br Ga 3. Post was not sent - check your email addresses! So let's say helium so hydrogen and helium helium is to the right. An atom of which of the following elements has the smallest atomic radius? c) Element 119 will be the largest, element 120 will be in the middle, and element 116, with fewer energy levels, will be the smallest. In the multiple-choice, the element with the smallest radius is (a) sulfur.That is because sulfur has the least number of electron shells. Which of the following atoms has the smallest atomic radius ? As you move down the period, more electron shells are filled. Periodic Table Trends. Helium (He) has the smallest atomic radius. Covalent radius is the radius calculated when an atom is bonded covalently with another atom of same element. Which element has the smallest radius? In the multiple-choice, the element with the smallest radius is (a) sulfur. since they are all in the same column then the one at the top is smallest … Which element has the smallest atomic radius. When the atomic radius is larger, it means the atom is larger. medina10152 . For all elements in period 2, as the atomic number increases, the atomic radius of the elements decreases, the electronegativity increases, and the ionization energy increases. Sledge. It also has the most number of nonmetals, namely five, among all periods. 1 0. Thus, helium is the smallest element, and francium is the largest. Largest atomic radius in Period 6. a) Smallest atomic radius in Group 6A(16). a) P^3- or Mg^2+ b) Be^2+ or O^2- or F^- or S^2- As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. In the third period of the periodic table, the element which has the smallest atomic radius is Argon.has 71 pm. Noble Gases. Answer and Explanation: When ranking the size of atoms of different elements, the most important factor is the number of energy levels. Which element has the smallest radius? So the order will be Oxygen