Safety matches contain
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Process of loosing electrons is known as _____.
There are ............ metalloids in the modern periodic table.
............ element is represented by the given symbol.
The modern periodic table consists of 18 groups and 7 periods. What is the atomic number of the element placed in the 3rd group and the 4th period?
Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules in
Which of the following is the best fire-extinguisher?
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