- What element has the largest atomic mass?
- Why is the ionic radius of K+ smaller than CL?
- Which is larger k or k+?
- What is the atomic radius of Br?
- What element has the smallest atomic mass?
- Which elements have the largest atomic radius?
- Which ion has the largest atomic radius?
- Why is the atomic radius of k larger than Br?
- What are the trends for atomic radius?
- Which ion is the smallest?
- What is the smallest atomic radius?
- Which element has the largest atomic radius K or Na?
- Which has the largest radius o2 F or F?
- How do you calculate atomic radius?
- What is the rarest element on earth?
- Why is element 118 so expensive?

## What element has the largest atomic mass?

OganessonOganesson has the highest atomic number and highest atomic mass of all known elements..

## Why is the ionic radius of K+ smaller than CL?

In other words, K+ has bigger effective nuclear charge than Cl− , which translates to a bigger net positive charge felt by the outermost electrons. This will compress the energy levels a bit and make the ionic radius smaller for the potassium cation. Therefore, the chloride anion will have the larger atomic radius.

## Which is larger k or k+?

The size of the potassium ion depends on the location of the single electron, present on fourth energy level which is the highest, from the nucleus. … The K+ ion has its outermost electrons on the third energy level now and is size is smaller than that of K ion. Hence, K is larger than K+.

## What is the atomic radius of Br?

185 pmBromine/Van der Waals radius

## What element has the smallest atomic mass?

HydrogenThe elemenents of the periodic table sorted by atomic massAtomic MassName chemical elementnumber1.0079Hydrogen14.0026Helium26.941Lithium39.0122Beryllium4108 more rows

## Which elements have the largest atomic radius?

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 ion has the largest atomic radius?

Explanation: The ionic radii of cations follow the same trends as atomic radii. They increase from top to bottom and from right to left in the Periodic Table. Thus, the ion with the largest radius is closest to the lower left corner of the Periodic Table, and that is the K+ ion.

## Why is the atomic radius of k larger 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.

## What are the trends for atomic radius?

SummaryAtomic 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.

## Which ion is the smallest?

Consequently, the ion with the greatest nuclear charge (Al 3 +) is the smallest, and the ion with the smallest nuclear charge (N 3−) is the largest….Ionic Radii and Isoelectronic Series.IonRadius (pm)Atomic NumberN 3−1467O 2−1408F −1339Na +98112 more rows•Jun 5, 2019

## What is the smallest atomic radius?

HeliumWhich element 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 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 has the largest radius o2 F or F?

From top to bottom of the periodic table ions will increase in radii. However, now left to right the radius is more of a function of the number of electrons. Mg2+ is smaller than Na+. … Similarly, O2- will be larger than F- as both have 10 electrons but Z=8 for oxygen and Z=9 for fluorine.

## How do you calculate 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.

## What is the rarest element on earth?

AstatineDensity (near r.t. ) Astatine is a chemical element with the symbol At and atomic number 85. It is the rarest naturally occurring element in the Earth’s crust, occurring only as the decay product of various heavier elements.

## Why is element 118 so expensive?

The most expensive natural element is francium, but it decays so quickly it can’t be collected to be sold. If you could buy it, you’d pay billions of dollars for 100 grams. The most expensive natural element that is stable enough to purchase is lutetium. … Atoms of synthetic elements cost millions of dollars to produce.