Q. 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?
Solution:
The modern periodic table now provides a useful framework for analyzing chemical reactions, and continues to be widely adopted in chemistry, nuclear physics and other sciences. All elements ranging from atomic numbers 1 (hydrogen) to 118 (oganesson) have been either discovered or synthesized
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