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 of the following ion has largest radius?
Ernest Z. K+ has the largest radius.
Which atoms has the largest radius?
Francium is the atom with largest atomic radius.
Why is K bigger than Br?
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 has the largest radius O or O 2?
O2− is larger than O because the increase in electron repulsions that accompany addition of an electron causes the electron cloud to expand. O2− is larger than O because O is neutral but O2− has a charge 2−. … S2− is larger than O2− because for particles with like charges, size increases going down a family.
Which element has the smallest radius?
Atomic radii vary in a predictable way across the periodic table. 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 is larger k or k+?
These are electrons with “highest energy level”. 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+.
Which is bigger F or Cl?
The order in decreasing size would be Cl- > F- > Na+ > Li+. This can be explained by the following logic. Cl- would be the largest because it has the largest number of electrons, i.e. 18. … Similarly Li+ would be the smallest because it has only 2 electrons and therefore the least electron- electron repulsion.
Are there any exceptions to the atomic radius trend?
Periodic Trend
The atomic radius of atoms generally decreases from left to right across a period. There are some small exceptions, such as the oxygen radius being slightly greater than the nitrogen radius. … Since the force of attraction between nuclei and electrons increases, the size of the atoms decreases.
What is the radius of RB?
290 pm
Does K or Br have a larger ionization energy?
Periodic Trends — Ionization Energy
| 1A | 7A | |
|---|---|---|
| 1 | H 1312 | |
| 2 | Li 513 | F 1681 |
| 3 | Na 496 | Cl 1251 |
| 4 | K 419 | Br 1140 |
Which is bigger O 1 or O 2?
O+1 ion contains 7 electrons and 8 protons ,O contains 8 electrons and 8 protons ,O-1 ion contains 9 electrons and 8 protons and O-2 ion contains 10 electrons and 8 protons. So O-2 is biggest in size.
Is K+ smaller than Ca2+?
ION RADIUS K+ < Cl- < S2- In this isoelectronic series, more protons means smaller radius. … (d) K+ is larger than Ca2+ Isoelectronic; Ca2+ has more protons to pull e- inward.
Is Al3+ smaller than Mg2+?
As you go from Na+ to Mg2+ to Al3+, the number of protons in the nucleus increases and so pulls the outer electrons in more and more. … The smallest ion will be the one with the largest number of protons – Al3+; the biggest, the one with the least protons – N3-.