Question

What is difference between 2Cl and Cl2? Which one of these two forms exist in nature? Also give the atomic mass of this element.

Answer 1

2Cl  is written when we have to balance the equations to preserve the law of chemical combination whereas Cl2 means that 2 chlorine atoms have combined to become stable

Answer 2

Difference between 2Cl and $Cl_2$

Explanation:

• The presence of two chlorine atoms is denoted as 2Cl, whereas the molecular formula of chlorine is denoted as $Cl_2$.
• Out of 2Cl and $Cl_2$, only $Cl_2$ exist in nature as chlorine is a diatomic molecule.
• In the periodic table, the element chlorine is located in the third period and 17th group.
• The atomic number of chlorine is 17 whereas its atomic mass is 35.453u.

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In the HCl molecule, the separation between the nuclei of the two atoms is about 1.27 Å (1 Å = 10–10 m). Find the approximate location of the CM of the molecule, given that a chlorine atom is about 35.5 times as massive as a hydrogen atom and nearly all the mass of an atom is concentrated in its nucleus.

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