Today’s Catalyst
•Complete the Exit Ticket from yesterday
•1. What is the difference between
Mendeleev and Moseley’s periodic tables?
Write your answer in complete sentences.
•2. How is the periodic table arranged today?
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Understanding the Properties of Different Element Groups in the Periodic Table, Lecture notes of Chemistry
An overview of the differences between Mendeleev and Moseley's periodic tables, the arrangement of the periodic table today, and a description of the properties of various element groups, including alkali metals, alkaline earth metals, halogens, noble gases, and transition metals. The document also explains the concept of valence electrons and their role in chemical properties.
What you will learn
- How many valence electrons does the alkaline earth metals group have?
- How is the periodic table arranged today?
- How do valence electrons affect the chemical properties of the halogens group?
- What are the main differences between Mendeleev and Moseley's periodic tables?
- What are the physical and chemical properties of the alkali metals?
Typology: Lecture notes
2021/2022
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Today’s Catalyst
- Complete the Exit Ticket from yesterday
- What is the difference between Mendeleev and Moseley’s periodic tables? Write your answer in complete sentences.
- How is the periodic table arranged today?
Rows (periods): elements are put in
rows by increasing atomic number
Columns (groups): elements are put
into columns (groups) based on how
they react (chemical properties)
Do Now
• Take three minutes and think about
your immediate family (mom, dad,
brothers, sisters)
• On the back of the exit ticket write 2
characteristics that everyone in your
family shares and 2 characteristics
that you do not share with any other
member of your family
Column = Group = Family
- Elements in a group are like members of a family-each is different, but all are related by common characteristics.
- Knowing an element’s group can help us predict its properties and how it will react.
Is like….
For your listening pleasure…
- The Element Song
- http://www.youtube.com/watch?v=zGM- wSKFBpo
Our Goal for Class:
- Describe the properties of chemical families including alkali metals, alkaline earth metals, halogens, noble gases, and transition metals
- Understand the relationship between valence electrons and chemical properties
Valence Electrons
• Electrons located in the outermost
electron shell that are responsible for
chemical bonding.
• These electrons are either given away,
taken, or shared with other elements to
create a chemical bond called a
compound.
• Commonly called the “hook up”
electrons
VERTICAL COLUMNS are called GROUPS or FAMILIES
HORIZONTAL ROWS are called PERIODS.
1 (1VE)
Alkali Metals
The Greatest Video…EVER
http://www.youtube.com/watch?v=92Mfric7JUc
VERTICAL COLUMNS are called GROUPS or FAMILIES
HORIZONTAL ROWS are called PERIODS.
1 (1VE) (^2) (2VE)
Alkali Metals (^) Alkaline Earth Metals
Transition Metals
Physical Properties: very hard, high boiling point, high electrical conductivity, malleable
Chemical Properties: less reactive than group 1 and 2 metals MOST important fact: occur in nature in elemental form
Have 2-3 VALENCE ELECTRONS
GROUPS 3-
Halogens
Physical Properties: nonmetals, diatomic molecules
Chemical Properties: very reactive, especially with alkali metals and alkaline earth metals
MOST important fact: most reactive group of nonmetals
Have 7 VALENCE ELECTRONS
GROUP 17
VERTICAL COLUMNS are called GROUPS or FAMILIES
HORIZONTAL ROWS are called PERIODS.
1 (1VE) (^2) (2VE) 3- (2-3VE)
13 (3VE)
14 (4VE)
15 (5VE)
16 (6VE) 17 (7VE)
Alkali Metals (^) Alkaline Earth Metals (^) Transition Metals
Halogens