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I learned that Alkali Metals are Highly reactive and that elements lose metallic properties as you go right down the table

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I learned the difference between ions and isotopes

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ញុំយល់ច្រលំជាមួយអ្វីៗគ្រប់យ៉ាង សូមឆ្លងកាត់អង្គភាពទាំងមូល i eat u dont  nigg

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I don't know the valence electrons - cations and anions and the negatively/positively charged

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ion isotope and half lives

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I learned how to work half lives and I learned that francium disintegrates after 22 minutes. I understand pretty much everthing

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ion and isotope (._.' )

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I learned how to read the periodic table and how to identify elements
I dont really understand cations and anions, isotopes, and half lives

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I don't know how to do half lives

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i know how to find protons, neutrons, and electrons
but idk how to do cation and anions

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How to calculate half-lives and idk how to write isotope notation and idk how to do the valence table thing

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could you go over cations and anions????

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I learned Hydrogen is the first element of the weird table thing

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i dont know wat we learned this unit

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I Dont Know How To Do Half Lites

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I know the periodic table well.

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I know the difference between ions and isotopes.

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I dont know how to do Half lives at all