2.1 The atom

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Learning Goals: (1 hour)

• State the position of protons, neutrons and electrons in the atom.
• State the relative masses and relative charges of protons, neutrons and electrons.
• Define the terms mass number (A), atomic number (Z) and isotopes of an element.
• Deduce the symbol for an isotope given its mass number and atomic number.
• Calculate the number of protons, neutrons and electrons in atoms and ions from the mass number, atomic number and charge.
• Compare the properties of the isotopes of an element.
• Discuss the uses of radioisotope.

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Pre-discussion Usborne Science
"Materials" pp. 2-5
Assignment: Homework MYP Chem 2.1a at quizstar.4teachers.org Minimum 80% correct.

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Khan Academy Lectures:

• Atoms & Elements
• Introduction to the Atom

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Homework CK-12 Chemistry
Read: pdf or online

Chapter 4: Atomic Theory http://www.ck12.org/flexbook/chapter/7511

Assignment: Homework MYP Chem 2.1b at quizstar.4teachers.org Minimum 80% correct.

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Extra Help - Brain Genie Practice Questions & Videos:

• ATOMIC NUMBER
• Determining the number of protons
• Determining the number of electrons
• Determining element given number of protons or electrons
• MASS NUMBER
• Determining the mass number from the numbers of protons and neutrons
• Determining the number of neutrons
• Determining number of all subatomic particles
• ISOTOPES
• Determining number of all subatomic particles

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Class Activities

Build an Atom

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Build an Atom.docx

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Isotopes and Atomic Mass

Isotopes and Atomic Mass.pdf

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Isotopes and Atomic Mass.docx

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• 312 KB

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