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  4. What is the atomic number of the element placed in period 3 and group 2 of the modern periodic table?

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Q. What is the atomic number of the element placed in period $3$ and group $2$ of the modern periodic table?

NTA AbhyasNTA Abhyas 2022

Solution:

The element placed in period $3$ and group $2$ is magnesium $\left(\right.Z=12\left.\right).$