Question

Though Moseley's equation $\sqrt{v}$ taken y - axis and Z on x-axis,if a straight line is obtained at angle of ${45}^{\circ }$ and y intercept equal to 1 is obtained when the frequency is 25 ${sec}^{-1}$ .Then ,atomic number of the element is

• A. 4
• B. 6
• C. 3
• D. 2

Answer 1

The correct option is B

6

$\sqrt{v}$ = a(z - b)

ab = 1a = 1

z-1 = $\sqrt{25}$ = 5

z = 5 + 1 = 6