Isotopes

Jamie Z 2024-01-29

Learning Goals

• Recall isotopes are atoms of the same element that have different numbers of neutrons

Electron Configurations

• Shows the location of each electron in an atom
• 1st shell = 2 electrons
• 2nd shell = 8 electrons
• 3rd shell = 8 electrons

E.g. 2,6 (Oxygen has 8 electrons)

Recall

Isotopes are atoms that have a different amount of neutrons, making them unstable. They have the same amount of protons and electrons and therefore are the same element. However, the atomic mass is different because the neutrons affect the mass

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Periodic Table

• Group - Vertical
• Period - Horizontal
• Going across the period the valence electron increases by 1 but the shell stays the same
• Going down a group the number of protons and electrons all increase and therefore the shells increase

Activity

Formulas

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