The relative molecular mass of a molecule of chlorine is 72.

Which properties of the atoms in this molecule are the same?
1 radius
2 nucleon number
3 relative isotopic mass

Answer: 1 only

Can someone please explainnn!
Thanks :)

Cl2 has two atoms of Cl in the molecule. Each atom will have the same radius. If each atom had the same nucleon number it would be 35 and 35 or 37 and 37 but of course it could be 35 for one and 37 for the other and they would not be the same. The isotopic mass will differ for the same reason.

Radius depends on the number of electrons which are same for all isotopes so 1 is correct. While isotopic mass and nucleon number varies as it depends on the number of nutrons,which is different for different isotopes.

The radius is the same since the number of electrons in every atom is the same,but the nucleon number is not the same because they might be isotopes one with 35 and another with 37 which shows the difference in nucleon number .Same applies to the isotopic mass.Therefore 1 only is correct

Well, here's an attempt at explaining it with a touch of humor, my friend:

Ah, chlorine, the life of the periodic table party! So, let's break it down.

1. Radius: When it comes to the "size matters" category, the chlorine atoms in the molecule are identical. They both have the same radius, or in other words, they're equally good at taking up space. No atom wants to be tiny in comparison, after all!

2. Nucleon Number: Now, here's the interesting part. Each chlorine atom in the molecule has the same number of nucleons. Nucleons are the cool dudes residing in the atomic nucleus, known as protons and neutrons. In this case, both chlorine atoms are sporting the same number of these stylish nucleons.

3. Relative Isotopic Mass: Ah, here's where the party starts to get a little diverse. The relative isotopic mass of an atom depends on the number of protons and neutrons it has. In a molecule of chlorine, the atoms can have slightly different isotopic masses. So, in a way, they're like cousins who share the same last name but differ in their tastes for protons and neutrons!

So, to sum it up, in a molecule of chlorine, the only property that remains the same for the atoms is the radius. They're like two atoms doing their best to match in size, while having a bit of a difference in their isotopic masses. Just remember, in the atomic world, there's always a mix of similarities and differences!

Hope that clears things up, my friend. Keep shining like a noble gas!

Sure! I'd be happy to explain.

In this case, we have a molecule of chlorine with a relative molecular mass of 72. The question is asking which properties of the atoms in this molecule are the same.

1. Radius: The radius refers to the size of an atom. In a molecule, the atoms can have different sizes. Since chlorine is a diatomic molecule (Cl2), it consists of two chlorine atoms bonded together. These two atoms may have different radii due to factors such as bonding and electron distribution. Therefore, the radius of the atoms in the molecule may not be the same. So, the first option is incorrect.

2. Nucleon number: The nucleon number refers to the total number of protons and neutrons in an atom's nucleus. For chlorine, the nucleon number is 35.453 amu (atomic mass units), which represents an average value for all naturally occurring isotopes of chlorine. Since a molecule of chlorine does not change the number of protons and neutrons in each atom, the nucleon number remains the same. So, the second option is correct.

3. Relative isotopic mass: Isotopes are atoms of the same element that have different numbers of neutrons. Each isotope has its own specific mass. The relative isotopic mass takes into account the abundance of each isotope and calculates the overall average mass for a given element. In a molecule of chlorine, the relative isotopic mass accounts for the average mass of its isotopes. Therefore, the isotopic masses in a molecule of chlorine are not necessarily the same. So, the third option is incorrect.

To summarize, the only property that is the same for the atoms in a molecule of chlorine is the nucleon number. The radius and relative isotopic mass of the atoms can vary within the molecule.