Physics · Chemistry
Which of the following statements with respect to the position of elements having atomic numbers 11, 12, 13, 14, 15, 16, 17, and 18, respectively, in the modern periodic table is INCORRECT?
- 1These elements belong to the second period of the modern periodic table.✓
- 2These elements belong to the third period of the modern periodic table.
- 3Electrons in the atoms of these elements are filled in K, L, and M shells.
- 4These elements are placed in the same period in the modern periodic table.
Correct answer
These elements belong to the second period of the modern periodic table.
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