2. Oct 22 / 23 Act B15 Families of Elements CH Q
LEARNING TARGET: I can use the chemical and physical properties of elements to group (classify) them by common features.
CH Q
How can elements be grouped based on their physical and chemical properties?
VOCAB:
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3. smallest "unit" of matter
Atom
atomic mass
Element
family (of elements)
Metal
Periodic Table of Elements
smallest "unit" of matter
atom "weight"
pure matter
related chemically
element with special properties
all types of matter arranged based on structure and properties

4. DISCUSSION
Identify parts of the Element Card

5. PROCEDURE AND DATA
MATERIALS:
PROCEDURE: Read on pg. B and summarize
DATA: Notes in Journal
- sort elements into at least 3 groups
- identify which family the groups go in and revise original groups
- FINAL CHART :
Record Classification System
- family names
- similar properties
- show increasing atomic mass

6. Alkali Metals Alkaline Metals Noble Gasses Halogens Metals (solid)
Reactive (high)
1 bond w/ Hydrogen
Oxidize (react with air)
Explosive (w/ water)
Soft metal
Metals (solid)
Reactive (low)
2 bond w/ Hydrogen
Earth metals
Non-metals
Reactive (high)
1 bond w/ Hydrogen
Metals (solid)
Reactive (low-none)
0 bond w/ Hydrogen

7. Alkali Metals Alkaline Metals Noble Gasses Halogens H - 1 He – 2
Ar – 40
Kr - 84
Li – 9
Na – 23
L - 39
Be – 9
Mg – 24
Ca – 40
F – 19
Cl – 36
Br - 80
What if I did this…..
Thoughts????
What if I told you there was a problem? One of these elements is in the wrong spot. Can you figure out which one it is??

8. 1 2 7 8 Alkali Metals Alkaline Metals Noble Gasses Halogens H - 1
Review the qualities (in your notes) of each of the families above. Focusing on the chemical properties, which family makes the most sense for Hydrogen?
Each of these groups / families have a number that they are referred by.

9. List three (3) things you notice about the atomic mass
The mass increases as you go across the periodic table from left to right
The mass increases as you travel down the periodic table
The size of the atom increases as the mass increases (more parts)

10. Dmitri Mendeleev's first Periodic Table
show element videos

11. ANALYSIS
- Discuss and answer Q 3, 4 & 5 on pg. B- 21

12. Sr Strontium Metal Solid Silver in color Atomic Mass 88
Reactivity: Very High
Number of bonds with Hydrogen: 2

15. ANS CH Q
How can elements be grouped based on their physical and chemical properties? A:
similar properties (P + C)
state/phase of matter (solid, liquid, gas)
metal or non-metal
increasing mass
reactivity
HOMEWORK
Finish AQs
Bring colored pencils