Atomic radii vary in a predictable way across the periodic table. 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 is the largest.
What 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.
Which element has the largest ionic radius?
1 Answer. Ernest Z. K+ has the largest radius.
Which of the following has largest radius 1s2?
Answer and Explanation:
While all of these ions and atoms have the 1s22s22p63s23p6 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 electron configuration due to the gain or loss of electrons by ions, (3) the sulfide ion S2− has the largest radius.
What is the formula of atomic radius?
Divide the distance between the nuclei of the atoms by two if the bond is covalent. For example, if you know the distance between the nuclei of two covalently bonded atoms is 100 picometers (pm), the radius of each individual atom is 50 pm.
Which has largest radius?
Since the atomic radius decreases in a period but increases down the group so Sr of group II and period V is largest in size.
Why is K bigger than Br?
Since potassium is located at the start of period 3, and bromine at the end of the same period, potassium will have a larger atomic radius than bromine, and thus the largest atomic radius of the four given atoms.
Which has the largest radius O or O 2?
O2− is larger than O because the increase in electron repulsions that accompany addition of an electron causes the electron cloud to expand. O2− is larger than O because O is neutral but O2− has a charge 2−. … S2− is larger than O2− because for particles with like charges, size increases going down a family.
How do you determine the largest atomic radius?
Atomic radii vary in a predictable way across the periodic table. 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 is the largest.
Which is larger F or Na+?
Na+ has smaller size than F- because both Na+ and F- have equal number of electrons i.e.10 . After losing an electron Na will have less electron cloud and more effective nuclear charge whereas F after gaining an electron will have less effective nuclear charge than the parent atom so the size increases .
Which has larger radius mg or CA?
1 Expert Answer
Calcium has a larger atomic radius than Magnesium. If you look on the period table you will notice Magnesium atomic number is 12, while Calcium is 20. Calcium(Ca) has 4 energy level while magnesium(Mg) has 3 Energy level.
Which of the following has the largest radius FCNO?
As we can see, only Potassium has four electron shells, therefore Potassium has the largest atomic size. Showing once again how Potassium has the largest atomic radius, and therefore the largest atomic size.
What is the atomic radius of RB?
290 pm
Is atomic size and atomic radius same?
What is Atomic Size? Atomic size is the distance between the centre of the nucleus of an atom and its outermost shell. In basic chemistry, the atomic radius is defined as the shortest distance between the atom’s nuclei and the outermost shell of the atom.
What is the atomic radius of lithium?
182 pm