Question

Radius of the fourth orbit in hydrogen atom is 8.5×10^-10m. calculate the velocity of electron in this Orbit .
Given m= 9.1×10^-31kg.
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Answer 1

please refer to attchment

hope it helps..

Answer 2

Answer:

• 5.5 × 10^5m/s

Explanation:

• As we know that For hydrogen z = 1

• Formula Vn = 2πke²/nh

• Where, k = 9×10^9 jm/c²
• h = 6.62×10^-34js
• e = 1.6 × 10^-19 c
• n = 4

Now , V4 = 2× 3.14 × 9× 10^9 × (1.6× 10^-19c)²/ 4× ( 6.62 × 10^-34)²

V4 = 144.69 × 10 ^-24 /26.05× 10^-34

V4 = 5.5 × 10 ^5 m/s Answer ✔

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Hope it helps you ;!!

@Raj❤