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- 1What is the empirical formula ?This is the simplest whole number ratio of atoms or ions of each element in a substance.
- 2What is a molecular formula ?This represents the actual number of atoms of each element in one molecule.
- 3What is the relative formula ?The sum of the relative atomic masses of all atoms or ions in its formula.
- 4What is a isotope ?They have the same atomic number but different mass numbers.
- 5How did Mendeleev arrange elements into a periodic table ?1. Mendeleev arranged these elements in order of increasing relative atomic masses.
- 6How did Mendeleev arrange elements into a periodic table ?2 . Mendeleev sometimes swapped the potions of elements if he thought that better suited their chemical properties
- 7How did Mendeleev arrange elements into a periodic table !EXAMPLE!Fluorine, Chlorine, bromine and iodine are non metals that do not easily react with oxygen whereas tellurium is a metal that burns in air. Iodine has a lower relative atomic mass than tellurium so Mendeleev should have placed it before tellurium according to this physical property. Instead he placed iodine after tellurium so that it lined up with fluorine chlorine and bromine ( elements with similar chemiclas properties to iodine)
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- Flashcards on Untitled, created by abdi mo on 19/09/2017.
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- abdi mo
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