Question

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❤Name d Formula Of d Compound Formed when -:
1) Sulphur reacts with Chlorine
2)Chlorine reacts with Aluminium

❤Which is greater in size(Give Reasons) -:
1) an atom Or a cation
2)an atom Or a anion
3)Fe2+ Or Fe3+

Answer 1

your answer is here
1) sulphur react with chlorine
sulfurdichloride(Scl2)
2) chlorine react with almunium
almunium chloride (AlCl3)


1)cation size is smaller than an atom
2)size of anion is greater than atom size.
3)Fe2+ is greater in size than Fe3+.

Answer 2

1). S+Cl2(g)=SCl2 a harmful substance formed
2). 2Al+3Cl2=2AlCl3

1).
The size of the atom becomes smaller when its a cation. It is smaller because it is positively charged meaning it has lost 1 or more electrons making it smaller.

2).
The size of the atom becomes larger with the anion. It is larger because it is negatively charged meaning it has gained 1 or more electrons making it bigger in size.

When an atom ionizes, either they accept or transfer electrons, their radius changes. 

In the formation of cation, the radius of the cation is generally smaller than its atom. For example:

The radius of Na+ is smaller than Na atom

 

In the formation of anion, the radius of the anion is larger than its atom. For example:

The radius of Cl- is bigger than Cl atom

This happens because when an atom accepts or gives up an electron to form an ion, it generally assumes a noble gas configuration.

forNa,when it loses an electron,its outer shall will be removed thus having a small ionic radius.it will have a similar configuration to taht of neon.
in case of cl,as it receives another electron,its configuration is that like of argon,this increasing its radius.


3)
Fe2+ is greater in size as it has lost less electrons than Fe3+ .So, the nuclear pull is more strong on Fe3+decreasing the atomic size. Thus Fe2+is greater in size. Fe2+ will be largerthan Fe3+.