Is BR or BR 1 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.
Is K+ or Ca2+ bigger?
(d) K+ is larger than Ca2+ Isoelectronic; Ca2+ has more protons to pull e- inward.
Why does K+ have a larger radius than Ca2 +?
Re: why ionic radius of K+ > Ca2+? As a result there is greater nuclear attraction on the outer electrons, drawing them closer to the nucleus.
Why is CA bigger than Ca2+?
Ca is larger than the Ca2+ because Ca2+ has a greater positive charge and electrons repel the nucleus. Ionic radius of a nonmetal is larger than its atomic radius- nonmetals sometimes gain electrons in the atom’s current energy level, additional electrons repel each other and increase the size of an atom.
Is O 1 or O 2 bigger?
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.
Which ion is larger Fe2+ or Fe3+?
Fe2+ is greater in size than Fe3+. Consider the electronic configuration of Fe2+[Ar] 3d6 and Fe3+ [Ar]3d5 (For comparison, Fe [Ar] 4s2 3d6). Fe3+ ionic radius is 63 pm, while Fe2+ has an ionic radius of 77 pm. (For comparison, the Fe atom has a radius of 140 pm.)
Which is larger S2 or K+?
S2− is larger than K+ because the decrease in electron repulsions that accompany addition of an electron causes the electron cloud to expand. S2− is larger than K+ because the two ions are isoelectronic and K+ has the larger Z and Zeff.
Why is there Fe2+ and Fe3+?
The reason why fe3+ is more stable than fe2+ is because, in fe2+ there are 6 electrons in d orbital as compared to 5 electrons in the case of fe3+. Since 10 electrons make fully filled d orbital (most stable) , the 5 electrons in fe3+ makes the d orbital half filled and therefore is more stable compared to fe2+.
Why is the radius of Fe2+ less than mn2+?
Simultaneously an electron is also added which enters to the inner f subshell. The shielding effect of f-orbitals in very poor due to their diffused shape. It results in the stronger force of nuclear attraction of the 4f electrons and the outer electrons causing decrease in size.
What are the causes of lanthanide contraction?
The Lanthanide Contraction is caused by a poor shielding effect of the 4f electrons. Gd because as atomic number increases, the atomic radius decreases. Yb because it has a larger atomic number. Because the elements in Row 3 have 4f electrons.
Which is more stable fecl2 or fecl3?
Answer Expert Verified Fe (III) is more stable than Fe (II) , but additional energy is needed to take that extra electron out. The outermost electrons in 4s2 are readily given out to Chlorine. But it requires a further catalyst or oxidant like Oxygen or H2O2 etc, to give out an unpaired 3d^6 electron from d orbitals.
Why can iron be 2+ and 3+?
So why can iron form both a +2 or a +3 oxidation state? Both will give better stability then the ground state electron configuration for iron. Ions form because they give better stability than ground state atoms, but not necessarily perfect stability. The two ions of iron both give better stability to the particle.
Which is more reactive Fe2+ or Fe3+ and why?
Fe3+ is more reactive since it has a higher valency state. In a reductive environment, Fe3+ will be more reactive. Fe3 is more stable than Fe2, so Fe2 is more reactive than Fe3.
Which is larger Na+ or Mg2+?
Talking about the ions of both the elements i.e. Na+ and Mg2+, as we know the size of any ion is smaller than its parent element. So, the size of Na+ and Mg2+ is smaller than Na and Mg respectively. Thus, the decreasing order of size is written as: Na>Mg> Na+>Mg2+. Therefore, the largest particle is Na.
Does Na+ have a bigger radius than Mg2+?
Answer. thereby making Mg have a SMALLER atomic radius. Hence, Na+ will be larger in size.
What is the atomic radius of Mg2+?
0.72 A
Which of the following has largest radius Na+?
1 Answer. Ernest Z. K+ has the largest radius.
Which of the following has the largest radius K Na+ Na K+?
K+ has a larger atomic radius than Na+. The Periodic Table is accompanied by many trends. One such trend involves the atomic radius for these elements. As you go down the periodic table, the atomic radius increases which is why K+ has a larger radius… it’s below Na+.
Is O2 bigger than F?
Explanation: From top to bottom of the periodic table ions will increase in radii. However, now left to right the radius is more of a function of the number of electrons. Similarly, O2- will be larger than F- as both have 10 electrons but Z=8 for oxygen and Z=9 for fluorine.
Which is largest in size a O2 B F C mg2+ D Na+?
d- F- Ionic radius increases with increase in positive charge on isoelectronic species. Here, Mg+2 will have largest ionic radius. Aakash EduTech Pvt.
Which of the following has the smallest radius O2 F Ne Na+ Mg2+?
Because of this, the ionic radius will just depend on the charge of the ion: the more positive the charge of an ion is, the smaller the ion is. This means Mg2+ will have the smallest radius since it has the most positive charge. The answer is Mg2+.
Which metal would be expected to have the smallest 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.