Which of the following halogens has the largest atomic radius?

Element Atomic Number (Z) Trend
fluorine 9 (smallest) ↓
chlorine 17
bromine 35
iodine 53 ↓ (largest)

Which of the following has the largest atomic radius?

So Cesium has the largest atomic radius among the given elements.

Which is the largest halogen?

Because of their great reactivity, the free halogen elements are not found in nature. In combined form, fluorine is the most abundant of the halogens in Earth’s crust. The percentages of the halogens in the igneous rocks of Earth’s crust are 0.06 fluorine, 0.031 chlorine, 0.00016 bromine, and 0.00003 iodine.

Which has the largest atomic radius Br or Cl?

Likewise, bromine will have a larger atomic radius when compared with chlorine.

Which element in period 3 has the largest atomic radius?

  • Atomic radius decreases from left to right within a period. This is caused by the increase in the number of protons and electrons across a period. …
  • Considering this trend Sodium is having a highest atomic radius in 3rd period.
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Which one has the largest 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.

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 breathing a halogen harmful?

Exposure to halogens, such as chlorine or bromine, results in environmental and occupational hazard to the lung and other organs. Chlorine is highly toxic by inhalation, leading to dyspnea, hypoxemia, airway obstruction, pneumonitis, pulmonary edema, and acute respiratory distress syndrome (ARDS).

Why are Group 17 called halogens?

The elements of Group VIIA (new Group 17 – fluorine, chlorine, bromine, iodine, and astatine) are called the halogens (tan column). The term “halogen” means “salt-former” because these elements will readily react with alkali metal and alkaline earth metals to form halide salts.

Which is the least reactive halogen?

As a general rule, fluorine is the most reactive halogen and astatine is the least reactive. All halogens form Group 1 salts with similar properties. In these compounds, halogens are present as halide anions with charge of -1 (e.g. Cl-, Br-, etc.).

Is Cl or Br bigger?

As Br is smaller than Cl; therefore, Br- have a smaller ionization energy than Cl-. In short, since the outermost electron in bromine is farther from the nucleus than the outermost electron in chloride, it takes less energy to remove the outermost electron in bromide.

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Is Br 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.

Is BR bigger than F?

Negative ions are bigger than the atoms they come from. Chlorine is 2,8,7; Cl- is 2,8,8. Although the electrons are still all in the 3-level, the extra repulsion produced by the incoming electron causes the atom to expand.

vdW radius (nm) ionic radius of X- (nm)
F 0.147 0.133
Cl 0.175 0.181
Br 0.185 0.196
I 0.198 0.220

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

Answer: 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.

Does atomic radius increase Period 3?

Explanation of this trend

Going across period 3: the number of protons in the nucleus increases so … … therefore the force of attraction between the nucleus and the electrons increases … and the atomic radius decreases.

Why does sodium have a larger atomic radius than aluminum?

When we move from right to left in the periodic table in the group, the atomic radius decreases. The reason for this is that the increasing number of electrons pull the shells closer to the nucleus. … That means the nuclear charge of aluminium is more and the electrons are pulled more ‘tightly’ as compared to sodium.

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