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2. Which elements are:
metals
nonmetals
metalloids
3. What does the term ‘chemical series’ mean?
4. What are the synonyms of the following words used in the article?
ingenious
location
recurring
to refine
to emphasize
unique
5. What is the difference between the following words? Are they synonyms?
devise
develop
invent
discover
Consist, contain or include?
The periodic table
consists of rows and columns
It
contains elements.
Different elements
include carbon, sulphur, hydrogen, oxygen etc.
1. The classic symptoms of exposure to toxic chemicals _______________ headaches, sore
throats, vomiting, etc.
2. The word’s trees ________________ between 460-800 billion tones of carbon.
3. The local fauna _______________ wolves, snakes and a wide range of unpleasant insects.
4. The graphs do not _______________ information about the use of the cell.
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5. Other greenhouse gasses _______________ carbon dioxide, methane and chlorofluorocarbons.
6. I could hardly __________________ my excitement.
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