'Counting atoms' presentation slideshows

Unit 5

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Atoms and Elements:The Nature of Matter

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Counting Atoms and Balancing Chemical Equations

Counting Atoms and Balancing Chemical Equations. Elements, Compounds, Mixtures. Hydrogen is an element. Oxygen is an element. When hydrogen and oxygen bond they make the compound water.

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Counting Atoms and Balancing Chemical Equations

Counting Atoms and Balancing Chemical Equations. Elements, Compounds, Mixtures. Hydrogen is an element. Oxygen is an element. When hydrogen and oxygen bond they make the compound water.

531 views • 38 slides

Chemical Reactions

Chemical Reactions. When one or more substances are changed into different substances a chemical reaction has occurred. Reactants ? Products Word equations use names of chemicals Chemical equations use the chemical formulas. Example. Example.

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Chapter 6

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Matter Class #3

Matter Class #3 OB: Principles of separating mixtures, counting atoms in chemical formulas, and the indicators of chemical reactions. First we count. How many atoms, what atoms are in each of these? H 2 O ___________ NaCl ___________ CO 2 ___________

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Grab binders, handouts & returned work & begin the Do Now

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9/26/11

61. 62. Counting Atoms. Counting Atoms. 9/26/11. 10/15/2013. 10/15/2013. A pplication How many atoms 1. 2. 3. 4. 5. Connection: Counting Atoms Ws Exit: How does a chemical formula help us know what atoms are in a compound? Explain in 2-3 complete sentences. Starter:

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Today in Science

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9/26/11

63. 64. Counting Atoms with Coefficient. Counting Atoms with Coefficients. 9/26/11. 10/16/2013. 10/16/2013. A pplication How many atoms 1 . Ba 3 (PO 4 ) 2 2 . 4Ba 3 (PO 4 ) 2 3 . Al 2 (Cr 2 O 7 ) 3 4 . 2Al 2 (Cr 2 O 7 ) 3 Connection : Counting Atoms with Coefficients Ws

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Counting Atoms

Counting Atoms. How to count atoms. 2H 2 O. COEFFICIENT. SUBSCRIPT. 2H 2 O. The coefficient gets applied to the ENTIRE formula -this means that there are 2 molecules of water present! -you MULTIPLY this number by every subscript in the formula. 2H 2 O.

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Bellringer

Bellringer. 1. What is the chemical formula for water? 2. How many hydrogen atoms are in a water molecule? 3. How many oxygen atoms are in a water molecule?. COUNTING ATOMS. Chemical Formulas. Tell what elements make up the compound and the number of atoms of each element.

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The Chemistry of Life

The Chemistry of Life. Counting Atoms. Three Subatomic Particles:. Atomic Number. The number of protons in an atom Unique for every element. Atoms are always electrically neutral. This means that protons always equal the electron. Silicon Nitrogen Zinc. 14 p & 14 e 7 p & 7 e

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Big Idea:

Counting Atoms in Compounds or Molecules. Big Idea: Given a chemical formula be able to count the number of atoms for each element in the compound or molecule. Parts of a Chemical Formula. 2 H 2 O 4 Pb (OH) 4. Element Symbol. Subscript. Coefficient. 3 Parts of a Chemical Formula.

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COUNTING ATOMS

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WHAT IS A MOLE?

WHAT IS A MOLE?. Image from: http://www.animationlibrary.com/sc/163/Other_Rodents/?page=7. Info modified from: http://genchem.chem.wisc.edu/sstutorial/FunChem.htm. COUNTING ATOMS. Atoms are too small to count individually Use a counting unit called Avogadro's number.

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Counting Atoms

Counting Atoms. Subscripts tell how many atoms of each element are present If formula has parenthesis or number in front , use the distributive property (like in math class) MgCl 2 H 2 O C 6 H 12 O 6. 2H 2 SO 4 Ba(NO 3 ) 2 Mg(C 2 H 3 O 2 ) 2 4NaCO 3. (NH 4 ) 2 O 2Fe(NO 3 ) 2

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COUNTING ATOMS

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Counting Atoms

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