- Science
Mission Objectives
Define an isotope and ionisation
Use the atomic and the mass numbers to work out the number of protons, neutrons and electrons in atoms
Explain how a positive ion is formed and deduce its charge from its electron configuration and position on the periodic table
Words and meanings to learn
neutron
a subatomic particle of about the same mass as a proton but without an electric charge
subatomic
smaller than or occurring within an atom
proton
a subatomic particle of about the same mass as a neutron with a positive electric charge. It has a charge of +1.
isotopes
variants of a particular chemical element which differ in neutron number, and consequently in mass number
ionisation
any process by which electrically neutral atoms or molecules are converted to ions (electrically charged atoms or molecules)
Resources: Class presentation, handout and modelling materials to make a model of lithium (optional).
Handout: Introduce the idea of history in science and the role women play in discoveries. Use this to discuss the invisibility of women in science.
Practice calculating the protons, neutrons and electrons in an atom and isotope using information from the periodic table and apply this knowledge to new examples
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