Which element would exhibit chemical behavior most like that of oxygen?
How does electron configuration influence chemical behavior?
Explain how the electron configuration influences the chemical behavior of an atom. The valence (outer shell) electrons want the outer shell to be full. In order to achieve this, they will react to either lose or gain or share electrons. Explain why elements within the same group behave in similar ways.
Which of the following describes any reaction that has reached chemical equilibrium?
Which of the following correctly describes any reaction that has reached chemical equilibrium? The rate of the forward reaction is equal to the rate of the reverse reaction.
Under which of the following conditions will an atom be the most stable?
Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons. Sodium atoms have 11 electrons. Two of these are in the lowest energy level, eight are in the second energy level and then one electron is in the third energy level.
How does an atom become stable?
An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom’s nucleus may result from an excess of either neutrons or protons.
Which ion is most stable?
Cr3+ ion is the most stable in aqueous solution on account of maximum crystal field stabilization energy.
Why is cu2+ more stable than Cu+?
Cu2+ is more stable than Cu+.Stability depends on the hydration energy (enthalpy) of the ions when they bond to the water molecules. The Cu2+ ion has a greater charge density than Cu+ ion and thus forms much stronger bonds releasing more energy.
Which is the most stable ion in 2 oxidation and why?
Pb has most stable +2 oxidation state due to inert pair effect.
Which is the most stable complex?
As C2O42− is a bidentate chelating ligand, it forms rings and hence [Fe(C2O4)3]3− is the most stable complex.
Why chelates are more stable than simple complexes?
Complexes involving multidentate ligands are more stable than those with only unidentate ligands in them. The underlying reason for this is that each multidentate ligand displaces more than one water molecule. An increase in entropy makes the formation of the chelated complex more favourable.
Which Ligand will give the most stable complex with metal ion?
From ligand strenth, we can see that CN− is strongest ligand among all so [Fe(CN)6]−3 is most stable complex ion.
Which of the following complexes is most stable 4 points?
[Fe(C2O4)3]3− is the most stable complex because C2O4 is a strong feild ligand and forms chelation also due to its bidentatc ligand.
Which of the following complex is more stable Why?
Solution. Chelating ligands form more stable complexes compared to non-chelating ligands. Since ethylene diammine is a bidentate ligand and forms stable chelate, [Co(en)3]3+ will be a more stable complex than [Co(NH3)6]3+.
Which of the following complexes are Homoleptic?
Solution : Homopleptic complex The complex containing only one species or group as ligand is known as homoleptic ligand. Here, [Co(NH3)6]3+ contain only NH3 as a ligand and [Ni(CN)4]2- contain CN as a ligand. While other two complexes [Co(NH3)4Cl2]+ and [Ni(NH3)4Cl2] contain NH3 and Cl as ligands.
Which of the following complexes is most stable cof6?
Answer: is more stable because it has chelate effect. Explanation: is known as cobalt (III) hexafluoride complex which has 6 monodentate ligands which is fluorine atom. Monodentate ligands are the ones which use only one donor atom for complexation.
Which of the following is more stable complex and why ?[ CO NH3 6 3+ and Co en 3 3+?
[Co(en)3]3+ is more stable than [Co(NH3)6]3+ as [Co(en)3]3+ is a metal chelate due to presece of bidentate ligand ethylene diamine ligand. Metal chelates are more stable than complexes containing only monodentate lignads.
Which complex is more stable and why k4fe CN 6 or K3Fe CN 6?
Answer. As Fe2+ is more stable than Fe3+ due to principle of half-filled orbitals . hence , K3Fe(CN)6 is more stable .
What is meant by chelate effect?
Answer: Lewis base which donates two lone pairs of electrons to the central metal atom is known as bidentate ligands. They are referred to as chelating ligands. Complexes containing chelate rings are more stable than complex without rings. This is called the chelate effect.
What is chelate used for?
Chelation means “to grab” or “to bind.” When EDTA is injected into the veins, it “grabs” heavy metals and minerals such as lead, mercury, copper, iron, arsenic, aluminum, and calcium and removes them from the body. Except as a treatment for lead poisoning, chelation therapy is controversial and unproved.
What are chelates give two examples?
A chelate is a chemical compound composed of a metal ion and a chelating agent. A chelating agent is a substance whose molecules can form several bonds to a single metal ion. In other words, a chelating agent is a multidentate ligand. An example of a simple chelating agent is ethylenediamine.
What is macrocyclic effect?
The macrocyclic effect is the high affinity of metal cations for macrocyclic ligands, compared to their acyclic analogues.
What are Cryptates?
Cryptands are a family of synthetic bicyclic and polycyclic multidentate ligands for a variety of cations. The term cryptand implies that this ligand binds substrates in a crypt, interring the guest as in a burial.
Which of the following is not a chelating ligand?
Oxalato, glycinato and ethylene diamine are large ligands and they can form rings because they all are bidentate ligands. So, they all are also chelating ligands. Thiosulphato is a monodentate ligand and hence, cannot form chelate rings. So, it is not a chelating ligand.
Which macrocycle can bind cations more tightly?
The organic macrocycle 12-crown-4 binds Li+ with modest selectivity. In CH3CN solution, Li+ ions bind to 12-crown-4 1.2 times more tightly than Na+ ions.
What is chelating ligand give example?
Chelating ligand is a ligand which is mostly attached to a central metal ion by bonds that are from two or more donor atoms. In other words, these are a type of ligands where the molecules can form several bonds to a single metal ion or they are ligands with more than one donor site.
What are polydentate ligands?
polydentate ligand: a ligand that is attached to a central metal ion by bonds from two or more donor atoms.
What is meant by chelation in chemistry?
Chelation is the formation of multiple coordination bonds between organic molecules and a transition metal ion leading to sequestration of the metal.
What are the types of ligands?
Types of Ligands
- Unidentate ligands: Ligands with only one donor atom, e.g. NH3, Cl-, F- etc.
- Bidentate ligands: Ligands with two donor atoms, e.g. ethylenediamine, C2O42-(oxalate ion) etc.
- Tridentate ligands: Ligands which have three donor atoms per ligand, e.g. (dien) diethyl triamine.
What are ligands How are they classified?
Ligands can be classified on the basis of many things. The most common classification of ligands is on the basis of their binding sites with the central metal atom or ion. On the basis of the number of sites, ligands can be classified as monodentate, bidentate, polydentate etc. ligands.
Is EDTA is a bidentate ligand?
Polydentate ligands range in the number of atoms used to bond to a central metal atom or ion. EDTA, a hexadentate ligand, is an example of a polydentate ligand that has six donor atoms with electron pairs that can be used to bond to a central metal atom or ion.