1. Trends in the Periodic Table
Properties
Shielding
Trends
Atomic Radius
Ionic Radius
Ionization Energy
Electronegativity

2. Properties
Elements in the same column (group) have similar properties but not identical properties. _________
Reactivity of metals increases down and to the left
______________
Noble gasses are …

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4. The Periodic Table

5. The Periodic Table

6. Alkali Metals – Group 1
Atoms of the alkali metals have a single electron in their outermost level
___________
They react violently with water and so are never found free in nature.

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8. Transition Metals – Group 3-12
They are good conductors of heat and electricity
Form coloured ions
Have varied valences
Show catalytic activity
Iron Metal
Gold

9. Metalloids Have properties of both metals and non-metals B – Boron
Si – Silicon …
As – Arsenic
Te – Tellurium
Po – Polonium

10. Halogens – Group 17 Noble Gases – Group 18
They are very reactive and are therefore never found free in nature. They occur as diatomics
Have 7 valence electrons
Chlorine Gas
Noble Gases – Group 18
They have a full outer energy level and are not reactive
Neon signs are created using a combination of nobel gases which gives them their different colours

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13. Trends There are 4 trends in the Periodic Table: Atomic Radius
Ionic Radius
Ionization Energy
__________

14. Atomic Radius (AR)
Is half the distance between the nuclei of 2 atoms of the same element
Across a Period:
AR decreases as …
Down a Group:
AR increases as the ____________

15. Atomic Radius

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17. Ionic Radius ANIONS (-’ve ions)
Are larger than the neutral state because:
The +'ve charge per # of electrons has decreased
____________

18. Ionization Energy
Is the amount of ___________________________ from an atom or ion in the gaseous state
A "gaseous atom" means an atom that is all by itself (not bonded to others in a solid or a liquid state)
1st Ionization energy:
the amount of energy required to _____________
2nd Ionization energy:
the …

19. Ionization Energy Increases:
From left to right as the number of protons increases which makes it more difficult to rip an electron away due to the ___________
As you move up a column since the valence e- _____________

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21. Check Your Understanding
Is the 2nd ionization energy going to be greater than, less than, or equal to the 1st ionization energy?
Answer: _____________
____________
______

22. Electronegativity ____________
Assigned values of 0 to Fluorine is the most electronegative atom with an electronegativity of Fluorine has the highest attraction for electrons of an atom on the periodic table
The trend …

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