Which out of them has the biggest radii Na Mg K Ca?

Answer: Potassium (K) with an atomic number of 19 has the largest atomic radius. This is because sodium and potassium are elements of group 1. On moving from top to bottom in a group, the atomic radius increases.

Which has largest 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 element has the largest atomic radius K or Na?

As an example, potassium (K) has a larger average atomic radius (220 pm)than sodium (Na) does (180 pm). The potassium atom has an extra electron shell compared to the sodium atom, which means its valence electrons are further from the nucleus, giving potassium a larger atomic radius.

Which is larger Ca2+ or K+?

(d) K+ is larger than Ca2+ Isoelectronic; Ca2+ has more protons to pull e- inward.

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Which among the following elements has the largest atomic radii sodium magnesium potassium calcium?

Magnesium belongs to Period 3 and Group 2. Aluminium belongs to Period 3 and Group 13. Potassium belongs to Period 4 and Group 1. Thus, potassium has the largest atomic radii.

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.

How do you know which element has 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 bigger Na or Na+?

Yes Na+ is smaller than Na because Na+ is formed when an electron is lost from the Na atom,Thus the effective nuclear charge increases bcz the number of protons exceeds the number of electrons . This results in bringing the valence shell a little closer to the nucleus because of a very strong nuclear pull.

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.

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.

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Is BR 1 or Br bigger?

Br – will have the largest atomic size because Br- has one extra electron in its valence shell which due to its unbalanced negative charge will be repelled and hence the atomic radius of Br- will increase.

Which is larger S2 or Ca2+?

For a) the neutral Ca atom has a larger radius than the Ca2+ ion. This is because the loss of electrons reduces the shielding effect between the electrons and the nucleus, so the attraction of the nucleus for the electrons is greater, reducing the radius. For b) S2− has a larger radius than the neutral S atom.

Is CA bigger than K+?

Ca has 2 electrons in its outermost shell and K has 1 electron but both elements are in the same period. Therefore,the attraction between the nucleus and electrons in Ca is greater than K. Therefore, atomic size of K is greater than Ca.

Which of following is largest in size?

So S2- has largest size.

Which lanthanide series metal has largest atomic radius?

Lanthanum is the first and repesentative element of Lanthanide series and size decreases with increase in atomic number. So, La has the largest atomic radii.

Which has larger atomic radius calcium or potassium?

Answer Expert Verified

The potassium has bigger atomic size than calcium because due to difference in nuclear charge the attraction between nucleus and more electrons of Ca then potassium it is increased the atomic radius of Ca is decreases due to contraction .

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