Helium has the smallest atomic radius.
Which is the smallest atom in Period 4?
Thus, helium is the smallest element, and francium is the largest.
Which element in Period 4 has the largest atomic radius?
For Period 3, the Group1 Alkali Metal (potassium, lowest Z) has the largest atomic radius and the Group 7/17 Halogens & Group 0/18 Noble Gas (bromine & krypton, highest Z’s) have the smallest atomic radii (there is some uncertainty in the noble gas radii).
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| symbol | K |
|---|---|
| Name | potassium |
| mpt/K | 337 |
| bpt/oC | 774 |
| bpt/K | 1047 |
Which of the following four elements has the smallest radius?
Fluorine (F) has the smallest atomic radius among the given elements.
Which of the following has smallest atomic radius?
Thus, Br has the smallest atomic radius.
Which period has the smallest atomic radius?
Explanation: 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.
Why does Period 4 have 18 elements?
Answer Expert Verified
When n = 4, we find that in the orbitals 3d, 4s and 3p which are present in the outermost shells have energies in increasing order — i.e. 3p<4s<3d. … So, maximum number of electrons found in the three orbitals is 9X2 = 18. Therefore, 4th period should have 18 elements.
How do you find atomic radius?
Atomic radius is determined as the distance between the nuclei of two identical atoms bonded together. The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.
What element in the second period has the largest atomic radius?
The element in the second period that has the largest atomic radius is the Lithium (Li).
What is the symbol for element with atomic number 74?
Tungsten is a chemical element with symbol W and atomic number 74. Classified as a transition metal, Tungsten is a solid at room temperature.
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Tungsten.
| Atomic Mass | 183.8u |
|---|---|
| Year Discovered | 1783 |
Which element has a larger atomic radius than phosphorus?
Atomic Radius of the elements
| Helium | 31 pm | 161 pm |
|---|---|---|
| Phosphorus | 98 pm | 183 pm |
| Selenium | 103 pm | 184 pm |
| Xenon | 108 pm | 185 pm |
| Silicon | 111 pm | 188 pm |
What is the atomic radius of K?
280 pm
Which element has the largest atomic number?
Oganesson has the highest atomic number and highest atomic mass of all known elements. The radioactive oganesson atom is very unstable, and since 2005, only five (possibly six) atoms of the isotope oganesson-294 have been detected.
What is the atomic radius of silicon?
210 pm
What is the atomic radius of germanium?
211 pm
Which of the following has largest atomic radius?
Also Na and Mg are in the same period, but Na belongs to 1 group and Mg belongs to 2 group, so atomic radius of Na is more than Mg, i.e., Na>Mg. Thus, if we take all these together we get K>Na>MgandK>Ca>Mg. Hence, we can say the atomic radius of K is largest.