Question

If there were 10 periods in a periodic table then maximum number of elements it can have is ______.

विकल्प

• 290

• 770

• 204

• None of these

Answer 1

If there were 10 periods in a periodic table then maximum number of elements it can have is 290.

Explanation:

Magic no (2n²) : 2, 8, 8, 18, 18, 32, 32, 50, 50, 72, 72

Period 1, 2, 3, 4, 5, 6, 7, 8, 9, 10

∴ element 2 + 8 + 8 + 18 + 18 + 32 + 32 + 50 + 50 + 72 = 290