CP- L1.5 Family of Elements

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TEKS 8.5(B):  identify that protons determine an element’s identity and valence electrons determine its chemical properties, including reactivity

TEKS 8.5(C): interpret the arrangement of the Periodic Table, including groups and periods, to explain how properties are used to classify elements

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​Today we will explore how elements are grouped together into families based on properties such as color, metallic character and reactivity.

Specifically, understanding how elements are grouped based on reactivity, will help us answer the chapter question.

Lesson Vocabulary

Chemical reactivity (or reactive): the likelihood of an element to undergo a chemical reaction with another substance

Alkali Metals: highly reactive metal elements in group 1

Alkaline Earth Metals: relatively reactive metal elements in group 

Halogens: reactive nonmetal elements in group 17

Noble gases: non reactive nonmetal elements in group 18

Chemical reactivity (or reactive): the likelihood of an element to undergo a chemical reaction with another substance​

Subject | Subject

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​The Periodic Table of elements organized elements into families (or groups) based on their properties. Elements in the same family have similar physical and chemical properties.

​The most reactive elements are found in groups 1 and 2.  These elements will readily react with other substances in a chemical reaction.  Group 18 elements (noble gases) are the least reactive and rarely participate in chemical reactions.

Active Video Notes

• 1. Title your notes: Element Reactivity Video Notes

• 2. Make sure you are seated so you can see my notes on the side board

• 3. Pay attention and learn!

​Exit Ticket Time!!

​YOU WILL NEED YOUR PERIODIC TABLE!!!!