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Ionic Bonding

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Yun Hui

on 8 September 2014

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Transcript of Ionic Bonding

Ionic Bonding
Resources
http://scienceforkids.kidipede.com/chemistry/atoms/ionic.htm

http://www.teachersdomain.org/asset/lsps07_int_ionicbonding/

http://www.visionlearning.com/library/module_viewer.php?mid=55

http://www.chem4kids.com/files/elem_pertable.html

http://midwaymsscience.weebly.com/uploads/8/2/9/8/8298729/section_2_-_ionic_bonds.pdf

http://www.elmhurst.edu/~chm/vchembook/143Aioniccpds.html

http://nobel.scas.bcit.ca/chem0010/unit5/5.1.2_edotFormula_2.htm

http://chemistry.about.com/od/elementfacts/ig/Atom-Diagrams/index.01.htm
How Ionic Bond is Formed
1

valence electron


In order to get 8 valence electrons, it need to lose 1 electron.
7 valence electrons

In order to get 8 valence electrons, it need to gain 1 electron.
Atoms on the right side of the periodic table form negative ions.
Introduction
What is ionic bonding ?

What are ions?
An ion is an
atom
that carries a
positive
or
negative charge
as a result of having
lost
or
gained
one or more
electrons.
- As the name implies, Ionic bonding occurs between
ions
.

- In order to build an ionic compound that will bond together, there should be a
positive ion
and a
negative ion.
(Charges that are alike repels. Charges that are unlike attracts.)

-It involves the
transfer of electrons
between
metals and
non-metals
to form
ions.


-The resulting compound is called an
ionic compound
.

-Ionic compounds have
high melting and boiling points
and
dissolves easily.

-
Metals lose electrons easily
as atoms of most metals only
have few electrons in their outermost shell. Hence,
positive ions

will usually be a metal.

-
Non-metals
form
negative ions
by gaining electrons.

This result in a
positively charged sodium ion

(Na+)
and a
negatively charged chlorine ion (Cl-).
Eg: Sodium is in group 1 so it have 1 valence electron.

The 2 ions are held together by the
force of attraction between the opposite charges
. This is called an
ionic bond
.
2 valence electrons

In order to get 8 valence electrons, it needs to lose 2 electrons.
6 valence electrons

In order to get 8 valence electrons, it needs to gain 2 electrons.

Sodium Chloride
NaCl
Magnesium Oxide
MgO
This result in a
positively charged magnesium ion (Mg2+)
and a
negative charged oxygen ion (O2-).
Magnesium Chloride MgCl2
2 valence electrons

In order to get 8 valence electron, it needs to lose 2 electrons.
7 valence electrons

In order to get 8 valence electrons, it need to gain 1 electron.
7 valence electrons

In order to get 8 valence electrons, it need to gain 1 electron.
This result in
positively charged magnesium ion

(Mg2+)
and
negatively charged chlorine ions (Cl-).

The simplest ratio of Mg2+ : Cl- is 1:2. Therefore the simplest formula for this ionic compound is MgCl2.
Mg lose electrons to Cl
-All of the elements in a same period have the same number of atomic orbitals.

Thank You!
Done By : Afrah (1), Yun Hui (14), Sri (15), Su (16) & Teng Ee (40)
Tips!
-The elements in the same group have the same number of electrons in their outer most orbital.
-Every element in the group one (first column) has one valence electron, every element in group two has two valence electrons so on and so forth.
-Every element in the first period (top row) has one orbital for its electrons. The elements in the second period have two orbitals for their electrons so on and so forth.

Eg: Magnesium is in the third period so it have 3 orbitals for its electrons.
Tips !
Atoms with less than 4 valence electrons will lose electrons to get a full outer shell of 8.

Atoms with more than 4 valence electrons will gain electrons to make a full outer shell of 8.

Atoms with 4 valance electrons do not gain or lose electrons. Atoms, such as carbon, form covalent bonds. They share electrons to become stable.
Valence Electron:

Number of electrons in the outermost shell
Full transcript