What is provided in each of the boxes of the periodic table?
- The graphic representation of each chemical element
- The atomic number of each chemical element
- The year of discovery of each chemical element
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Which is the correct definition of the word synthesis?
- A method used to combine several substances, through one or more reactions,
to produce the desired products
- A method used to separate the constituents of a mixture using a selective filter
- A method used to separate a volatile solvent from a non-volatile liquid phase
in which it is in solution
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Which of these methods is not a separation technique?
- Filtration
- Dilution
- Distillation
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Which of these chemicals is a mineral salt?
- Rock phosphate
- Vinyl chloride
- Ammonium nitrate
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For what purpose did the United Nations adopt the Globally Harmonized
System in July 2003?
- To provide an international classification of chemicals
- To provide a classification of chemicals specific to each country
- To provide a European classification of chemicals
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