Periodic Table Families

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Chemistry

Atoms

10th

Last updated 5:22 PM on 1/11/23
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10 Terms

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Alkali Metals
Group 1

* Very Reactive
* Soft
* Less Dense
* 1-Valence Electron
* Positive Ions
2
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Alkaline Earth Metals
Group 2

* Very Reactive
* Soft
* Less Dense
* 2-Valence Electrons
* Positive Ions
* Turns Pink in Phenolphthalein
3
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Transition Metals
Groups 3-12

* Not Reactive
* Strong
* More Dense
* 1-2 Valence Electrons
* Make Great Colors as Ions
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BCNO
Groups 13-16

* No consistency
* Different Physical & Chemical Properties
5
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Halogens
Group 17

* Very Reactive
* Non-Metals
* Negative Ions
* Produce Salts (Halides)
* Toxic/Poisonous
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Noble/Inert Gases
Group 18

* Stable Valence Electron Configurations
* Helium = Less Dense
* Neon-Radon = More Dense
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Electronegativity
Ability to gain an electron

* Increases: Left → Right
* Decreases: Up → Down
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Atomic Radius
Distance from Middle of Circle to Outermost Shell

* Decreases: Left → Right
* Increases: Up → Down
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Ionization Energy
The amount of energy required to remove an electron from an isolated atom or molecule

Increases: Up → Down

Increases: Left → Right

Remember: Closest to Fluorine = Higher Energy
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Reactivity
The impulse for which a chemical substance undergoes a chemical reaction.

Decreases: Left → Right

Increases: Up → Down