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Презентация на тему Electron Structure

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2. Atomic StructureProtons, neutrons, electronsHow to make ionsRelative atomic mass
4. 0-1+111200019.109 x 10-311.602 x 10-191.672 x 10-271.602
5. Ionisation EnergyWhat is ionisation energy?DefinitionsFirst ionisation energySuccessive ionisation energiesWhat affects ionisation energy?
6. WHAT IS IONISATION ENERGY?Ionisation Energy is a
7. WHAT AFFECTS IONISATION ENERGY?The value of the
8. Ionisation Energy is affected by 3 things:Atomic
9. Successive Ionisation EnergiesA measure of the energy
10. Which electron is removed first?(First Ionisation Energy)
11. Which electron is removed first?(First Ionisation Energy)
12. Successive Ionisation Energies of CalciumDraw a graph
15. 1s2 2s2 2p6 3s2 3p6 4s22,8,8,2
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Atomic StructureProtons, neutrons, electronsHow to make ionsRelative atomic mass

0-1+111200019.109 x 10-311.602 x 10-191.672 x 10-271.602 x 10-191.675 x 10-270Inside an

Ionisation EnergyWhat is ionisation energy?DefinitionsFirst ionisation energySuccessive ionisation energiesWhat affects ionisation energy?

WHAT IS IONISATION ENERGY?Ionisation Energy is a measure of the amount of

WHAT AFFECTS IONISATION ENERGY?The value of the 1st Ionisation Energy depends on

Ionisation Energy is affected by 3 things:Atomic RadiusNuclear AttractionElectron ShieldingI. E. Decreases

Successive Ionisation EnergiesA measure of the energy required to remove each electron

Which electron is removed first?(First Ionisation Energy)

Successive Ionisation Energies of CalciumDraw a graph to show the successive ionisation

Put these words in order of importance:Ionisation energyAtomSuccessive ionisation energyIonEnergy levelMost ImportantLeast Important

Слайды презентации

Слайд 2 Atomic Structure
Protons, neutrons, electrons
How to make ions
Relative atomic

mass

Слайд 3

Слайд 4 0
-1
+1
1
1
2000
1
9.109 x 10-31
1.602 x 10-19
1.672 x 10-27
1.602 x

0-1+111200019.109 x 10-311.602 x 10-191.672 x 10-271.602 x 10-191.675 x 10-270Inside

10-19
1.675 x 10-27
0
Inside an atom
Atomic number = no. protons

in nucleus

Mass number = no. protons + no. neutrons

Ion: a positively or negatively charged atom or group of atoms

Слайд 5 Ionisation Energy
What is ionisation energy?

Definitions
First ionisation energy
Successive ionisation

energies

What affects ionisation energy?

Слайд 6 WHAT IS IONISATION ENERGY?
Ionisation Energy is a measure

WHAT IS IONISATION ENERGY?Ionisation Energy is a measure of the amount

of the amount of energy needed to remove electrons

from atoms.
As electrons are negatively charged and protons in the nucleus are positively charged, there will be an attraction between them. The greater the pull of the nucleus, the harder it will be to pull an electron away from an atom.

FIRST IONISATION ENERGY - Definition
The energy required to remove ONE MOLE of electrons from each atom in ONE MOLE of gaseous atoms to form ONE MOLE of gaseous positive ions.

e.g. Na(g) Na+(g) + e-
Al(g) Al+(g) + e-

Make sure you write in the (g)

Слайд 7 WHAT AFFECTS IONISATION ENERGY?
The value of the 1st

WHAT AFFECTS IONISATION ENERGY?The value of the 1st Ionisation Energy depends

Ionisation Energy depends on the electronic structure
Hydrogen
Helium
Lithium
The value for

helium is higher than that for hydrogen because there are now two protons in the nucleus. The nuclear charge is greater so the pull on the outer electrons is larger. More energy will be needed to pull an electron out of the atom.

519 kJ mol-1

1310 kJ mol-1

2370 kJ mol-1

Слайд 8 Ionisation Energy is affected by 3 things:
Atomic Radius

Nuclear

Ionisation Energy is affected by 3 things:Atomic RadiusNuclear AttractionElectron ShieldingI. E.

Attraction

Electron Shielding
I. E. Decreases
I. E. Decreases
I. E.

Increases

Слайд 9 Successive Ionisation Energies
A measure of the energy required

Successive Ionisation EnergiesA measure of the energy required to remove each

to remove each electron in turn.

Mg(g) ? Mg+(g) +

e- 1st I.E. =+738 kJ.mol-1

Mg+(g) ? Mg2+(g) + e- 2nd I.E.= + 1451kJ.mol-1

Mg2+(g) ? Mg3+(g) + e- 3rd I.E.= + 7733kJ.mol-1

Mg3+(g) ? Mg4+(g) + e- 4th I.E.= + 10541kJ.mol-1

Слайд 10
Which electron is removed first?

(First Ionisation Energy)

Слайд 11
Which electron is removed first?

(First Ionisation Energy)

Слайд 12 Successive Ionisation Energies of Calcium
Draw a graph to

Successive Ionisation Energies of CalciumDraw a graph to show the successive

show the successive ionisation energies of calcium, using the

log10 values

(press log, then the number, then = )

Explain all the main points about the graph that you can see (use Pg 41 of OCR AS Chemistry to help you)