7th Chemistry - Atomic Calculations

St. George's College

Subject: 7th CHEMISTRY

Class: Atomic Calculations

Teacher's notes

Objectives

Vocabulary Link and Learn

Prepared by

Date: April 15th

2009 1

7th Beethoven ‐ Atomic Calculations Name

Oral Intervention

Coin

Chocolate

Ariana Gabriel Andrea Abraham Giacomo Fabiana Sinead Liliam Francesca Rodrigo Andres Stefano Jean Pierre Diego Rodrigo Luis Andrea Sebastián Ivanna Camila Carlos Aarón Paola Enrique Alessandra Irma Sophia Naomi Kiara Christopher

2

7th Mozart‐ Atomic Calculations Name

Oral Intervention

Coin

Chocolate

Nicole Luis Luciana Antonella Valeria Ch. Valeria C. Analucía Camila Franco Ramiro Sara Alicia José Luis Sergio Roberto Giancarlo Fiorella Gabriela Steffano Javier

Roberto R. Diego Luis Fernando Sebastián Julio Sherley César Vilma Alessandra V.

3

Exercise 1 Identify the following Elements, by name or chemical symbol.

Element's Name

Chemical Symbol

Element's Name

Au

Scandium

Lawrencium

Chemical Symbol

Nb Na

Tin

Polonium

As Kr

Plutonium

4

Element's Name

Chemical Symbol

Atomic Number

Os

Atomic Mass

# Electrons

190 65

Curium

30

247 Hg 43

5

Exercise 2 Calculate the molecular mass in the following compounds: Molecular Oxygen Water Carbon Monoxide Carbon Dioxide Sodium Chloride Hydrogen Peroxide Glucose

6

Exercise 3 1. What is the percentage by mass of oxygen (O) in sodium hydroxide (NaOH)?

2. What is the percentage by mass of chlorine (Cl) in perchloric acid (HClO4)?

7

8

Exercise 4 Photosynthesis is the process used by autotrophic organisms to produce their own food.

Obejtives: 1. Determine the general formula of the process.

2. Calculate the percentage in molecular mass of Carbon in the reactants, and then in the products section of the general formula.

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10

11

Let's check an example on how to fill the electron shells.

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Resources Used Slide (Group)

Resource

Description

Origin

G1 ‐ 2

Image

Beethoven

http://bit.ly/Q7ggk

G1 ‐ 3

Image

Mozart

http://bit.ly/18LkW6

G1 ‐ 4 G1 ‐ 6 G1 ‐ 8 G1 ‐ 10 G1 ‐ 11 G1 ‐ 12

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Teacher's Notes This class has been designed to cover the topics of Atomic Calculations from Monday April 13th till Friday April 17th.

For further knowledge about this topic: 1. Conduct a thorough search under the topic: Atomic Calculations on the Web, books and magazines.

2. If findings are not specific, ask your teacher for suggestions.

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Objectives • Identify and determine the atomic properties of elements: atomic mass and atomic number.

• Perform basic calculations with atomic mass and atomic number.

Note: All, or most, of the objectives will be covered during class time, however the student must be responsible for those objectives not covered or concluded.

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Vocabulary • • • • • • •

Matter: Atom: Nucleus: Electronic Cloud: Proton: Neutron: Electron:

Note: Most of the vocabulary words will be covered during class time, however the student must be responsible for those words not covered or concluded.

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Link and Learn You can visit the following websites to improve your understanding on the present topic: • • • • • •

http://bit.ly/PvvMp http://bit.ly/KCmja www.sanjorge.edu.pe http://science‐learning2009.wikispaces.com http://learningandscience.blogspot.com http://libraryatstgeorge.blogspot.com

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Prepared by

Gerardo LAZARO Science Lead Teacher Email: glazaro@sanjorge.edu.pe Wiki: http://science‐learning.wikispaces.com Blog: http://learningandscience.blogspot.com Twitter: http://twitter.com/glazaro

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Attachments

7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Supergoo to the Rescue.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Graphene's Superstrength.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Meteorites may have sparked life on earth.docx 7th Chemistry ­ Reading 1 ­ Branches of Chemistry ­ Plastic munching microbes.docx