Removal of carbon particles from air involves the principle of
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________ is used for making vinegar.
Most liquids that conduct electricity are solutions of acids, bases and ______.
Which of the following elements has the electronic configuration 2, 8, 3?
The main mineral constituents of the continental mass are ________ and alumina.
_________ gets converted to phosgene, when exposed to sunlight.
The atoms of Germanium, Arsenic, Selenium and Bromine contain ...... shells.
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 1st group and the 4th period?
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