Topic Wht I hve lerned bout the topic
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Подписываем
договор
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D.L Mendeleyev
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Mendeleyev
discovered
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Mendeleyev
predicted
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Mendeleyev experimented with
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What I knew about the topic
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What I have learned about the topic
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- Find words in the text that mean the following:
- Substance which has not so far been split up into a simpler form by ordinary chemical methods.
- List, orderly arrangement, of facts, information, etc.
- Branch of science that deals with how substances are made up, how they (their elements) combine, how they act under different conditions.
- Are the following statements true or false? Correct the false ones.
- The Periodic Table consists of vertical periods and horizontal groups.
- The properties of the elements are a periodic function of the nuclear charges of their atoms.
- There were known 1044 elements at the time of publishing Mendeleev’s Periodic Table.
- The table contains 117 elements as of 27 January 2008 (elements 1—116 and element 118).
- Mendeleyev’s periodic system continues to form the basis for the most complex research.
- Work in pairs: ask and answer questions.
A. What| modem| cornerstonesj chemistry?
b.
- How many| were| in 1869| elements] known?
-
- What| predict] Mendeleyev?
- .
- Whatj enable| Periodic Table| to predict] scientists?
- .
- Fill in the blanks using the words under the line.
- One of the ... of modem chemistry is the Periodic Law.
- Mendeleyev arranged the elements in order of increasing atomic ....
- There were several ... positions in Mendeleyev’s periodic table.
tern.
- In this table all the data about chemical elements are arranged into ... sys-
- His name will be ... in the discovery of new artificial elements.
j j perpetuated; 2) one well-constructed; 3) cornerstones; 4) weight; 5) vacant