In the periodic table, how many periods include, the elements of atomic number 1 to 18
The elements of atomic number 1 to 18 are arranged in 3 periods in periodic table. 2 elements in 1stperiod, 8 elements in 2nd and 8 elements in 3rd.
645 MCQ for effective preparation of the test of Basics of Chemistry section.
Read the MCQ statement: In the periodic table, how many periods include, the elements of atomic number 1 to 18 , keenly and apply the method you have learn through the video lessons for Basics to give the answer. Record your answer and check its correct answer and video explanation for MCQ No. 132-2318.