Periodic Table: Special Families

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• Groups/Columns/Families: vertical. Have similar properties. Periodic Table: Special Families 1.Group 1: Alkali Metals – 1 electron in the valence (outermost) level. Hydrogen – 1 Lithium – 3 Sodium - 11

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Periodic Table: Special Families. Groups/Columns/Families: vertical. Have similar properties. Hydrogen – 1 Lithium – 3 Sodium - 11. Group 1: Alkali Metals – 1 electron in the valence (outermost) level. Periodic Table: Special Families. - PowerPoint PPT Presentation

Transcript of Periodic Table: Special Families

Page 1: Periodic Table: Special Families

• Groups/Columns/Families: vertical. Have similar properties.

Periodic Table:Special Families

1. Group 1: Alkali Metals – 1 electron in the valence (outermost) level.

Hydrogen – 1 Lithium – 3 Sodium - 11

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Periodic Table:Special Families

Group llA: Alkaline Earth Metals – 2 electrons in the valence level.

Beryllium-4 Magnesium-12

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Periodic Table:Special Families

Group VllA: Halogens – 7 electrons in the valence level.

Fluorine – 9 Chlorine - 17

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Periodic Table:Special Families

Group VlllA: Noble Gases – All have full valence levels.

Helium – 2 Neon – 10 Argon - 18

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• Stable atoms: ones with full energy levels.

• All atoms try to become “stable” = chemical bonding 1. Gain or lose electrons = ionic bond 2. Share electrons = covalent bond

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Activity:

Page 7: Periodic Table: Special Families

QUESTIONS

1. What happens to the atomic number as you move from left to right across a period?

2. What happens to the atomic mass as you move down a family?


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