One atom of K 1939 containsA- 20 P - 19 n and 19 e-B- 19 P - 20 n and 19 e-C- 19 P - 20 n and 20 e-D- 20 P - 19 n and 20 e-

The correct option is B K^39_19 contains P = 19; e̅ = 19; n = 20 ...

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One atom of K...

Question

One atom of $ K^{39}_{19}$ contains

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Solution

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One atom of $K_{19}^{39}$ contains:

(P-proton, n-neutron and $¯ e$ -electron)

(i) 8 p + 2 n

(i i) 8 p + 22 n

(i i i) 18 p + 22 n

(i v) 20 p + 20 n

p^{2} - 17 p - 38

(p - 19) (p + 2)

(p - 19) (p - 2)

(p + 19) (p + 2)

(p + 19) (p - 2)

n^{2} - 19 n - 92

Solve: $n + 5 = 19 (n - 1)$

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