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What are the basic units of all matter?
What are the basic units of all matter?
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TEKS: I CAN recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts (8.5D)
Essential Question: How can we determine the number of atoms in chemical formulas containing subscripts, coefficients, and parentheses? We will discuss chemical formulas, what they represent, and how to count the atoms represented by them.
Pay attention to:
Important vocubulary
How atoms combine
Steps to count atoms
TEKS: I CAN recognize that chemical formulas are used to identify substances and determine the number of atoms of each element in chemical formulas containing subscripts (8.5D)
Set up journal page 35. Essential Question: How can we determine the number of atoms in chemical formulas containing subscripts, coefficients, and parentheses? We will discuss chemical formulas, what they represent, and how to count the atoms represented by them. Pay attention to:
Important vocubulary
How atoms combine
Steps to count atoms
Be sure to write examples of how to count atoms in a chemical formula.
What are the basic units of all matter?
Take additional notes on vocabulary:
subscript
coefficient
Follow all the steps to count atoms:
1. Identify the elements (capital letters)
2. Write the coefficient for ALL
3. Multiply by the subscript for each
4. Multiply by the parenthesis subscript (only elements within the parenthesis)
ESSENTIAL QUESTION: How can we determine the number of atoms of each element?
Add a text box and type your answer.
SENTENCE STEMS:
In order to find the number of atoms of each element……
First,.......then,,,,,
How many total atoms are in the chemical formula?
C₆H₁₂O₆
How many molecules are present?
3C₂H₄O₂
How many Sodium atoms are in the chemical formula?
Na(OH)₂
How many elements are in the chemical formula?
2Cu(NO₃)₂
Using your 6 colored pencils, draw each model on journal page 34.
What is the basic unit of matter?
Choose 2 that are pure elements
Which 2 are compounds?
What is the difference between molecules and compounds?
ESSENTIAL QUESTIONS: What does a chemical formula represent?
Add a text box and type your answer.
SENTENCE STEMS:
A chemical formula contains……
The number of atoms….
A ratio….
If an atom has 1 valence electron, what other atoms might it join with to form a chemical bond and form a new chemical compound?
How many different elements are in the formula?
How many total atoms are in the chemical formula?
The coefficient of a chemical formula tells you how many ____ are present.