SP6b - Inside Atoms

Questions

• What are the three subatomic particles within an atom?
• Draw and label the current accepted model of the atom
• What is the 'plum pudding' model of the atom?

Inside Atoms

• Protons and neutrons are called nucleons - because they are in the nucleus
• What are the charges on subatomic particles?
• How heavy do you think they are?
• 
• Bildunterschrift: Current accepted model of the atom

Using symbols

• We can represent subatomic particles using numbers with symbols (look at the Periodic Table)
• The bigger number is called the mass number
• The smaller number is called the atomic number
• 
• Bildunterschrift: Chemical symbol for Carbon on the Periodic Table

How many?

Task

• Fill in the table and stick it into your books

Isotopes

• Two atoms of the same element always have the same atomic number
• They can have different mass numbers - what does this mean?
• Atoms of the same element with different mass numbers are called isotopes

Task

• Complete the worksheets