Short-Question

# What do you mean by the atomic radius?

## What do you mean by the atomic radius?

The atomic radius is defined as one-half the distance between the nuclei of identical atoms that are bonded together. Figure 1. The atomic radius (r) of an atom can be defined as one half the distance (d) between two nuclei in a diatomic molecule. Atomic radii have been measured for elements.

What is the best definition for the term atomic radius?

Atomic radius is generally stated as being the total distance from an atom’s nucleus to the outermost orbital of electron.

What is meant by atomic radius quizlet?

Atomic Radius Definition. One-half the distance between the nuclei of identical atoms that are bonded together. Cations. positively charged ions, smaller than its neutral atom.

### How is atomic radius defined or measured?

The atomic radius is measured based on the distance between the nuclei of two atoms that are barely touching each other, which means the electron shells of the two atoms are just touching each other. This diameter between the atoms is divided by two to give the radius.

What is atomic radius Class 9?

Atomic radius is the distance from the centre of the nucleus to the outermost shell containing electrons. In other words, it is the distance from the center of the nucleus to the point up to which the density of the electron cloud is maximum.

What is atomic radius in chemistry class 11?

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## What is meant by atomic radius Class 9?

What is meant by atomic radius Class 11?

Atomic radius: it is defined as “the distance from the centre of the nucleus to the outermost shell of electrons”. The covalent and Van der Waals radii decrease with increase in atomic number as they move from left to right in a period. The atomic radius decreases from left to right within a period.

What is meant by atomic radius What trend is observed among the atomic radii of main group elements across a period explain this trend?

Among the main group elements, the atomic radii decreases across a period. The decrease in atomic radii across a period is due to the increasing positive charge of the nucleus. The increasing nuclear charge causes the electron cloud to be pulled closer to the nucleus, resulting in a smaller atomic radius.

### What is the atomic radius trend on the periodic table?

In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant. Down a group, the number of energy levels (n) increases, so there is a greater distance between the nucleus and the outermost orbital.

Where do you find the 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.

What are the factors that determine an atomic radius?

Summary 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.

## How do you calculate atomic radius?

Atomic Radius: Atomic radius can be calculated as the distance from the nucleus of an atom to its boundary of the electron cloud. Ionic Radius: Ionic radius can be calculated by dividing the distance between two nuclei of two ions according to their sizes.

How can we measure the atomic radius of an atom?

The Atomic radius of an atom is measured by X-ray or other spectroscopy methods. The atomic radii of elements vary in the periodic table in a fixed pattern. We can explain this trend by considering the nuclear charge and energy level.

What is one way atomic radius can be defined?

The atomic radius is measured based on the distance between the nuclei of two atoms that are barely touching each other , which means the electron shells of the two atoms are just touching each other. This diameter between the atoms is divided by two to give the radius.