Does Zeff increase, decrease or stay the same for transition metals in a row?

Md Ariful Islam

0 like 0 dislike
1 views
Share with your friends

1 Answers

Md Ariful Islam

Call

The effective nuclear charge ($Z_"eff"$) increases slightly along a transition series.

This is because more protons are added in the nucleus, whereas the same number of electrons is added in the (n-1)d subshell, (where n is the number of the period and the quantum number of the s type outer electrons).

If the d subshell were completely enclosed in the atom's core, the core positive charge "felt" by the , that is, the effective nuclear charge, would remain exacly consfant for a transition series.

Technically speaking, this would be expressed by saying that the added (n-1)d electrons would be entirely capable of shielding the positive charge of the protons.

Since the (n-1)d orbitals are excedingly elongated, their electrons reach the outer n shell, provoking a non-negligible repulsion on the .

Hence the (n-1)d electrons are only partially capable of shielding the increasing nuclear charge, and, consequently, the effective nuclear charge or overall positive core charge, increases as the increases for a transition series.

0 like 0 dislike
1 views
Talk Doctor Online in Bissoy App
Is the earth’s axis always in the same plane? Does the tilt stay the same? What does this effect?

A line is an 1-D space. Plane is a 2-D space and is a 3-D space. Two lines (in same or different directions ) determine a plane Earth's axis...

1 Answers 1 views
Does an increase in the salinity of seawater result in an increase or decrease in density?

By definition, $"density,"$ $rho="Mass"/"Volume"$.... Addition of salt to water definitely increases the MASS of the solution, while only marginally affecting volume. As the water becomes more saline, a given object...

1 Answers 1 views
Why are neither the alkali metals nor the alkaline-earth metals found uncombined in nature?

Sodium $Na_11^23$ is so reactive that if sodium metal is placed in water it will react vigorously to produce Hydrogen gas and heat often causing an explosion. All of...

1 Answers 1 views
What is the difference between the hydroxides of non-metals, and the hydroxides of metals?

And the hydroxides of metals are usually bases... And a few oxo-acids are $(HO)_2S(=O)_2$, $(HO)_3P=O$, $HOstackrel+N(=O)O^(-)$, and $(O=)_3ClOH$...what are the conventional names of these acids? On the other hand, when...

1 Answers 1 views
The atomic radii of transition metals do not decrease significantly across a row. As you add electrons to the d-orbital are you adding core electrons or valence electrons?

for discussion on atomic radii of the transition metals.

1 Answers 1 views
Does electronegativity increase or decrease when you go a period on the periodic table? Does it increase or decrease when you move down a group on the periodic table?

As we face , increases ACROSS the Period from LEFT to RIGHT, BUT DECREASES down a Group, a column of the the Periodic Table. So why? Well, we will first...

1 Answers 1 views
How many transition metals actually have used more than 8 valence electrons? Does $"Ag"$ have 11 valence electrons or 1 or what?

In terms of actual , there is literally only one example. You can consider that their oxidation states have never gotten higher than $+8$, except for Iridium: In terms...

1 Answers 1 views
A photon on a hydrogen atom excited an electron from $n = 1$ to make a transition to $n=3$. What is the wavelength (in run) pertaining to this transition and was the transition emitting or absorbing in nature?

In order to solve this question we will use the Bohr Model. The change in energy according to Bohr can be calculated by: $DeltaE=-2.178xx10^(-18)Z^(2)J(1/(n_("final")^2)-1/(n_("initial")^2))$ Here, the initial level is $n_("initial")=1$...

1 Answers 1 views
What is the electronic configuration of the first row transition metals and their dications? Why is the configuration of $Cr^(2+)$ unusual?

The atomic configuration of the first row transition series is....: $1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^n$ The ionic configuration of the $M^(2+)$ cation is (usually)........ $[1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)3d^n]^(2+)$ The $4s$ electrons are conceived to be removed FIRST...

1 Answers 1 views
As water freezes to ice does its volume decrease or increase? Does the mass decrease or increase?

How to remember this? Consider the fate of the $"Titanic"$. Ice bergs float. Of course, an object will be more buoyant in salt water than in freshwater, however, when you...

1 Answers 1 views
X