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Chemical Bonds

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anuthra sirisena

on 4 August 2014

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Transcript of Chemical Bonds

Chemical Bonds Ionic & Covalent bonds covalent bonds.. Identify the Bonds NaCl CF4 N,H other examples??? lets look at Chlorine again they can SHARE! sharing.... donate or accept chlorine atom e.g. Magnesium atom Ionic Bonds.... only happens when there is a donation or acceptance of electron/s

Sodium atom (2.8.1) will donate it's 1 valence electron to become Sodium ion (2.8) --> Na+

Chlorine atom (2.8.7) will receive that 1 electron to become Chlorine ion (2.8.8) --> Cl-
Magnesium atom will donate 2 electrons to
become stable... hence it's a Mg2+ ion now...

Mg (2.8.2) has 2 valence electrons and that's not stable. To become stable, Mg has no choice but to DONATE 2 of its valence electrons.

Mg ion is now (2.8) which is a stable octet
electron arrangement! As chlorine will need an electron to
become stable... it will accept one electron
from Magnesium to become Chloride ions
The 2 electrons from Mg will be accepted
by 2 Chlorine atoms (each Chlorine accepts
ONE electron)
So, we will now have MgCl2.....
.........an ionic compound..... sharing is caring.... It's not always about
giving and taking....

If IONIC refers to releasing electron and receiving
electrons to become stable,

COVALENT is all about SHARING!!! They can
either share 1 pair of electrons (single bond),
2 pairs of electrons (double bonds) as well as
3 pairs of electrons (triple bonds).... Chlorine atom (2.8.7) often times need an electron
to become stable....

when two chlorine atoms exist... each will need
an electron to be stable.... but they can't find any
atoms who are willing to give them the electrons...
both of them are in need of an ELECTRON!

So, what should they do???? they can each share the one electron they have...
Now, after sharing, they both have octet electron
arrangement..... any other possible sharings?

Examples please....

Give me 2-3 examples of a covalent bond that you know Explain in your own words, how the
above compound is formed.
[5 marks] Identify the compound above and explain how it is formed.
[5 marks] Ammonia can be prepared with the reaction between
Nitrogen and Hydrogen through the Haber Process.

Explain in term of chemical bonding, how ammonia
compounds are formed with the given raw materials,
liquid nitrogen and hydrogen.

[5 marks] this chlorine atom now has 8 valence e This chlorine atom has 8 valence e too
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