Atomic radii Definition and 19 Threads

Also, why does red taper off slope towards the end of the subsequence, but green and purple never taper off in slope (flatten out)?

I am doing some work on atomic structure. I have an app for referencing the charge radius of nuclei of elements and their isotopes, however I need a table that has the atomic radii of the elements and their isotopes.

I'm getting too different answers for atomic radius of iridium. I've already found 1.34 x 10-8 but all shows different answers. I mean like 1.34, 1.35, 1.36... Are those correct?

Homework Statement Below is an image of a unit cell for MgO. Does MgO have the lattice structure of NaCl or ZnS? If the density of MgO, ##\rho## = 3,58g/cm3, evaluate the sizes of the radii of Mg2+- and O2--ions. Answers: 149pm and 62pm Homework EquationsThe Attempt at a Solution Looking...

Atomic radii of Na is much bigger than of Cl yet the drawings in Chemistry books often depict Na atoms smaller than Cl. Is there a reason for that??

Why does the atomic radii get smaller from the left to right of a period but get bigger from top to bottom of a group? Wikipedia says in an article about electron shielding "Next we take Beryllium, Be as an example. It has 2 electrons in the 2s shell and thus, these electrons will repel each...

First, it says in my textbook that in an anion, the atomic size will be larger than that of the neutral atom. It says this is because the extra electrons causes more repulsion and then increases the atomic radius. In the next chapter, it says as you move across a period [from left to right] in...

Hi all, What are the common atomic radii that are used for drawing chemical pictures? Is it the ionic or calculated or? Thanks.

How does atomic radii decrease when we move left to right in a periodic table? Though the nuclear charge increase as a result of increase in number of protons,the same increase is occurring in number of electrons.

Hi, How would you determine the relative atomic sizes of a neutral atom and an ion? I can't figure this out. It can't be that all neutral atoms are always smaller than all ions can it? For example, how would I determine if Cl- is smaller or larger than S?. (The answer is that Cl- is...

for the calculations in one of my homework questions, i need to use the atomic radii of Fe and Ni, the problem is that every site i come across gives me different values Fe wikipedia 126pm physlink 1.72A chemicool 140pm how do i know which one to "trust" ?

I answered a question that my professor asked: "Why is the boiling point of HF much higher than that of HCl even though HCl has a larger molar mass?" The answer had to do with F being more electronegative than Cl and thus making stronger H-bonds. He also said on an aside that it all boils...

Could anybody help me with this? The atomic radii of the transition metals show some anomaly in their atomic radii as compared to those elements in Group 1A-7A, which generally shows a decrease as one goes from left to right in a period. The atomic radii of the transition metals decrease as...

which atom has a larger atomic radius: K+ or Ar ?

hey just wondering where I went wrong Iridium Crystallizes in a face centred cubic unit call that has an edge length of 3.833A The atom in the cantre of the face is in contact with the corner atoms calculate the atomic radii of the irridium atom I did this using pythag...

hey guys! I was just wondering if anyone could help me out a bit on this. I have the following radii (in angstroms...not that it really matters) Ca: 1.74 Ca 2+: .99 Zn: 1.31 Zn 2+: .74 Does anyone have any idea why the difference between the atomic radii of the two elements is...

[SOLVED] Atomic radii I need to know precisely how the average atomic radii are calculated or found? I would expect it to be on the average contents of an experimental sample with adjustment for differing percentages. This would mean that isotopes missing from the sample are not included in...

Apologies for raising this question again, but it has finally dawned on me that as the Tables of Elements give an average mass (i.e. for all isotopes of each element) as the Relative Atomic Mass for that element; then my question is - Is the figure quoted for Atomic Radii also an average...

Can anyone tell me where to find Atomic Radii for Isotopes? (All the tables I have found so far only list atomic radii for the 92 elements shown on the main table.)