This presentation discussed the periodic trend.

1. PAUL HOPER DIAMANTE

2. The
Periodic Trends

3. What Are These???

4. PATTERN OF PERIODIC TABLE

5. VALENCE
SHELL

6. BONDING

7. OBJECTIVES
Understand what is periodic
trends
Learn what are the different
periodic trends
Have fun

8. PERIODIC TRENDS
SPECIFIC PATTERNS IN THE
PROPERTIES OF ELEMENTS
THAT CAN BE OBSERVED IN
THE PERIODIC TABLE

9. 1
2
4

10. Electronegativity
Describe an atom ability to
attract and bind electrons

11. Because electronegativity is a qualitative
property, there is no standardized method
for calculating electronegativity. However,
the most common scale for quantifying
electronegativity is the Pauling scale

14. ALWAYS REMEMBER
 From left to right across a period of elements,
electronegativity increases.
 Important exceptions of the above rules include
the noble gases
 As for the transition metals, although they have
electronegativity values, there is little variance
among them across the period and up and down a
group.

15. IONIZATION ENERGY
ENERGY REQUIRED TO
REMOVE AN ELECTRON
LOWER IONIZATION ENERGY
MEANS THE ATOM EASILY
BECOMES A CATION

17. • The ionization energy of the elements
within a period generally increases from
left to right.
• The noble gases possess very high
ionization energies because of their full
valence shells as indicated in the graph.
Note that helium has the highest
ionization energy of all the elements.

18. ELECTRON AFFINITY
Electron affinity is the ability of an atom to
accept an electron.
Unlike electronegativity, electron affinity is a
quantitative measurement of the energy change
that occurs when an electron is added.
The more negative the electron affinity value,
the higher an atom's affinity for electrons.

20. ATOMIC RADIUS
ONE HALF THE DISTANCE BETWEEN
THE NUCEI OF TWO ATOMS

24. MELTING POINT
AMOUNT OF ENERGY REQUIRED TO
BREAK BONDS TO CHANGE SOLID TO
LIQUID.
HIGHER FOR METALS
LESSER FOR NON-METALS

25. METTALIC CHARACTER
THE ABILITY OF AN ATOM TO
LOSE AN ELECTRON

26. Metallic character relates to the
ability to lose electrons, and
nonmetallic character relates to the
ability to gain electrons.

28. PERIODIC TRENDS
ELECTRONEGATIVITY
IONIZATION ENERGY
ELECTRON AFFINITY
ATOMIC RADIUS
MELTING POINT
METALLIC TREND

29. THANKS