5. Atomic Structure and the PT

• Chemistry
• Secondary Education
• Age 12,13

• Complete the paperwork (Practical Workbook, pages 243 to 246.

Chromatography Practical

23 October 2023, Monday

Atomic Structure

Topic 5 Atoms, Elements, Compounds 

23 October 2023

• Describe the differences between elements, compounds and mixtures  
• Describe the structure of the atom as a central nucleus containing neutrons and protons surrounded by electrons in shells
• State the relative charges and relative masses of a proton, a neutron and an electron
• Define proton number/atomic number as the number of protons in the nucleus of an atom
• Define mass number/nucleon number as the total number of protons and neutrons in the nucleus of an atom

I intend to:

23 October 2023, Monday

• What makes a salt solution a mixture?

A question that matters!

23 October 2023, Monday

From your memory

Elements, Compounds, Mixtures Diagrams

Atomic Structure

Topic 5 Atoms, Elements, Compounds 

23 October 2023

Structure of the Atom

Discussion Forum

• Since the size of the atoms is too tiny and we cannot compare their masses with conventional units, what unit do we use instead?
• What is one relative atomic mass equal to?
• Using this in q2, what mass of hydrogen is equal to carbon-12 atom?
• What are the relative masses and charges of the sub-atomic particles in an atom?

Atomic Mass Unit

Masses and Charges

phet.colorado.edu

Atomic Structure

Simulation - Build an Atom

Self-Assessment for Learning

T O  D O:

• Identify two ideas you do not understand quite well in our sessions.
• Ask someone who can explain and write the explanations in your notebook.
• Verify your learning from a classmate by sharing it with the teacher.

Week 12 Reflection 

Why does a car tire explode 

when the temperature increases?