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. Thus, helium is the smallest element, and francium is the largest.
Which elements have the highest atomic radius?
Explanation: Francium has the largest, Helium has the lowest. Atomic radius increases as you go to the left and downward due to the attraction of electrons and the nucleus in an atom.
Which has largest radius?
Thus O2− has a minimum z-effective thus largest radius.
Which element has the largest atomic radius quizlet?
The general trend in atomic radius is that moving down the periodic table, the size increases; moving across the periodic table from left to right, the size decreases. Therefore, rubidium has the largest atomic radius whereas helium has the smallest.
Is Br or Br bigger?
Br – will have the largest atomic size because Br- has one extra electron in its valence shell which due to its unbalanced negative charge will be repelled and hence the atomic radius of Br- will increase.
What is the atomic radius of B?
180 pm
Which is larger F or Na+?
Na+ has smaller size than F- because both Na+ and F- have equal number of electrons i.e.10 . After losing an electron Na will have less electron cloud and more effective nuclear charge whereas F after gaining an electron will have less effective nuclear charge than the parent atom so the size increases .
Which has a larger radius Na or Na 1?
So p/e ratio is 1 and Na+ ion nucleus has eleven positive (p) charge and ten negative charge (e). … As is known from the chemistry course, when the element loses electron (turn into cation, with positive charge), the atom radius is getting low, so obviously Na+ is smaller than Na.
Which has a larger radius F or F?
F has a larger radius than F− because an additional electron causes greater repulsion in F.
Which group has lowest atomic radius?
Helium has the smallest atomic radius. This is due to trends in the periodic table, and the effective nuclear charge that holds the valence electrons close to the nucleus. Atomic radius decreases as you move across a period from left to right and decreases as you move up a group from bottom to top.
Which has larger atomic radius Cl or Br?
Likewise, bromine will have a larger atomic radius when compared with chlorine. … Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.
Which ion has the largest atomic radius?
1 Answer. Ernest Z. K+ has the largest radius.
Is BR smaller than Kr?
Br- has to be larger than Kr because it has one less proton, hence electron repulsion is more pronounced.
Which one has the largest size BR I?
Br is placed above I in periodic table. Thus Br is smaller than I+,I,I−. Among I+,I,I− the lowest effective nuclear charge is experienced by I−. Thus it has largest size.
Which is larger K+ or K?
When at neutral, the potassium ion in the form of K has an electronic configuration of: … The K+ ion has its outermost electrons on the third energy level now and is size is smaller than that of K ion. Hence, K is larger than K+.