As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and decreases from left to right across a period. Thus, helium is the smallest element, and francium
What element in period 2 has the largest atomic radius?
Answer: In the second period of modern periodic table Lithium (Li) is the element with largest atomic radius.
Which element in period 2 has the smallest atomic radius?
Fluorine is the element with smallest atomic radii.
Which element given has the biggest atomic radius?
Explanation: Francium has the largest, Helium has the lowest. Atomic radius increases as you go to the left and downward due to the attraction of electrons and the nucleus in an atom.
What has 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.
Which cation has smallest radius?
So, in the end, we can conclude that nickel ions have a minimum radius. So, the correct answer is Option C. Note: While comparing the ionic radius, we should consider all the points.
How do you find atomic radius?
Atomic Radius
The radius of an atom can only be found by measuring the distance between the nuclei of two touching atoms, and then halving that distance . As you can see from the diagrams, the same atom could be found to have a different radius depending on what was around it.
Which best explains why ionization energy tends to decrease?
The ionization energy decreases because the full s orbital shields the electron entering the p orbital . ... Electrons get farther from the nucleus. When electrons are removed from the outermost shell of a calcium atom, the atom becomes. a cation that has a smaller radius than the atom.
Which atom has the largest ionization energy?
The ionization energy decreases from top to bottom in groups, and increases from left to right across a period. Thus, helium has the largest first ionization energy, while francium has one of the lowest.
Which ion has the largest radius?
Ernest Z. K+ has the largest radius.
Why does atomic radius decrease across a period?
Across a period, effective nuclear charge increases as electron shielding remains constant . A higher effective nuclear charge causes greater attractions to the electrons, pulling the electron cloud closer to the nucleus which results in a smaller atomic radius.
Which has a larger atomic radius Na or CS?
According to the trend in a periodic table, atomic radius increases down the group. Both Na and Cs are the same group elements (group number 1). ... So, Cs has a larger atomic radius .
Which ion has the smallest radius Li+ Na+ K+ Be2+ Mg2+?
Also, the Be2+ ion has a higher charge than the Na+ ion. So, there cannot be any doubt about the positions of Na+ and Be2+ as the largest and the smallest ions among the four. Now, coming to Li+ and Mg2+, the values of their radii are 0.74 A and 0.72 A respectively (‘A’ stands for angstrom unit).
Which ion has smallest radius?
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 Ca 2 + will have the smallest radius since it has the most positive charge.
