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The Ionic Bond. Visit www.worldofteaching.com For 100’s of free powerpoints. Helium, neon and argon are atoms which do not react with other atoms. We call them the Inert Gases (or Noble Gases) because of this. Each of these gases has a full outer electron shell (orbit). 10p10n. 18p22n.

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the ionic bond
The Ionic Bond

Visit www.worldofteaching.com

For 100’s of free powerpoints

slide2

Helium, neon and argon are atoms which do not react with other atoms.

We call them the Inert Gases (or Noble Gases) because of this.

Each of these gases has a full outer electron shell (orbit).

10p10n

18p22n

2p2n

20

Ne

4

He

10

2

40

Ar

18

2,8

2,8,8

slide3

Sodium

23

Na

11

e.c. 2,8,1

11p

12n

11 protons

12 neutrons

11 electrons

slide4

Chlorine

35

Cl

17

e.c. 2,8,7

17 protons

17p

18n

18 Neutrons

17 electrons

slide5

+

The Sodium atom has 1 Electron in it’s outer shell.

Na

e.c. 2,8,1

Atom

The Sodium loses 1 electron to leave a complete outer shell.

It is now a Sodium ion with a charge of 1 +

(Na +)

e.c. (2,8)+

Ion

slide6

-

The Chlorine atom has 7 electrons in it’s outer shell.

Cl

e.c. 2,8,7

Atom

(Cl - )

The Chlorine gains 1 electron to gain a complete outer shell.

It is now a Chlorine ion with a charge of 1 -

e.c. (2,8,8)-

Ion

slide7

The Ionic Bond

Chlorine atom

Cl

Sodium atom

Na

+

-

Sodium ion

(Na +)

Chlorine ion

(Cl -)

The sodium atom loses one electron to attain a complete outer shell and become a positive ion (Na +). The Chlorine atom gains one electron to attain a complete outer shell and become a negative ion (Cl –).Strong electrostatic forces attract the sodium and chlorine ions.

slide8

Ionic Compounds

  • Held together by strong electrostatic forces
  • Opposite charges attract
  • High melting points and boiling points
  • Regular structures – giant ionic lattices
  • When melted or dissolved ionic compounds conduct electricity