Answer: The correct answer is Option D.
Step-by-step explanation:
Elements are distributed into 7 period and 18 Groups in a periodic table.
Elements are classified into three categories:
- Metals: They are called as metals because they loose electrons to attain stability. These elements belong from Group 1 to group 13 of the periodic table. They are present in the upper left and lower left corner of the periodic table.
- Non-metals: They are called as non-metals because they gain electrons to attain stability. These elements belong from Group 15 to group 17 of the periodic table. They are present in the upper right corner of the periodic table.
- Metalloids: They are called as metalloids because they show properties of both metals and non-metals. These elements belong from Group 14 of the periodic table. They are present in the middle of the periodic table.
Hence, the correct answer is Option D.