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# How does the size of a nitrogen molecule compare to that of oxygen?

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Molecular size a bit tricky. As a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured in picometers (1 pm= 1x 10-12 m). Nitrogen's covalent radius is 75pm so the length of a nitrogen (N2) molecule ought to be 4 X 75pm or 300 pm. A molecule of oxygen (O2) ought to be just a shade smaller 4 X 73pm or 292pm. So an oxygen molecule is a little less than 3% smaller than a nitrogen molecule.

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This isn't the best response, as it does not take into account the different bonding which is present in the two molecules.

Although one could use covalent radius, it is more appropriate to use a covalent radius determined from similar bonding.

For nitrogen, the covalent radius for a triple bond is 54 pm.
For oxygen, the covalent radius for a double bond is 57 pm.

(Numbers from Wikipedia...)

From these numbers alone, one would expect diatomic nitrogen (with its triple bond) to be smaller than diatomic oxygen (with its double bond).

These numbers are similar to bond lengths for diatomic nitrogen and diatomic oxygen of 110 pm (~2 x 54 pm) and 121 pm (~2 x 57 pm), respectively.
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# Ionization energy of nitrogen compared to oxygen?

  Answer   the ionization energy of nitogen is more than oxygen because it possesses half filled p orbitals which increases its stability and results in higher I.P.

Yes they do.

# How does the size of a nitrogen molecule compare to that of a helium molecule?

Covalent radius of nitrogen = 75 picometer Covalent radius of helium = 32 picometer So the radius of nitrogen is double than that of helium

# Are oxygen molecules bigger or smaller then nitrogen molecules?

  Elemental oxygen molecules are smaller than elemental nitrogen molecules.

# What is the size of a nitrogen molecule?

Molecular size a bit tricky. As a quick comparison, we can use the covalent radius defined as 1/2 the distance between to identical covalently bonding nuclei. This is measured

# How does the size of a nitrogen molecule compare to that of carbon dioxide?

  The bond length of a C-O bond in CO2 is 116.3 pm and the bond length of N-N is 110 pm. But there are two CO bonds in CO2 so it is larger.

# How many molecules of oxygen are in nitrogen dioxide?

 Two with one atom of Nitrogen

# How does density of helium compare to the density of oxygen and nitrogen?

He 0.1786 g/L O2 1.429 g/L N2 1.251 g/L

# Why are water molecules lighter than oxygen and nitrogen?

Your question is not worded very well, but this answer is directed at what I think you are trying to ask. Water (chemical structure: H2O) has 2 Hydrogen atoms and 1 oxygen at

# What molecule contains carbon oxygen and nitrogen?

Many different molecules contain carbon, oxygen and nitrogen.

# How does density of helium compare to density of oxygen and nitrogen?

Helium is lighter (less dense) than oxygen & nitrogen.

# How can you compare the density of carbon dioxide hydrogen oxygen and nitrogen?

Gas densities: Hydrogen: 0,08988 g/L Nitrogen: 1,251 g/L Oxygen: 1,429 g/L Carbon dioxide: 1,977 g/L

# What molecule in the ground is nitrogen found in when oxygen is around?

in what molecule in the ground is nitrogen found when there is  oxygen around?

Yes

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# Why the size of oxygen gas molecules are smaller than that the nitrogen gas molecules?

The size of an atom is based mainly upon the relative numbers of protons and electrons, and then where the electrons will be located. Since oxygen has one mroe proton than nit

# How does the size of a nitrogen molecule compare to that of freon?

Nitrogen is N2 (2 atoms) for instance  Freon-13 is CClF3 and has a  total of 5 atoms (1 carbon, 1 chlorine and 3 fluorine atoms).  Nitrogen is smaller.