2.1 : BOHRS' ATOMIC MODEL

Choose the CORRECT statement of Bohrs' Postulate.

• Electron moves around the nucleus in a temporary circular orbit.

• The energy of the electron at a certain energy level always zero

• The change of energy occur when the electron moves within an orbit.

• The change of energy occur when the electron make transition between allowed energy state

What is the ground state for Balmer series ?

• 1

• 2

• 3

• 4

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NGSS.HS-PS4-3

Which of these electron transitions correspond to emission of energy?

• 2 to 4

• 4 to 2

• 2 to 3

• 2 to 5

Calculate the energy of an electron at fourth energy level

• −1.36x10⁻¹⁹ J

• −2.18x10⁻¹⁸ J

• - 2.42 x 10⁻¹⁹ J

• - 3.41 x 10⁻¹⁹ J

What is the wavelength of

a photon emitted during transition from

ni= 6 to nf= 4.

• 1.283 x 10⁻⁹ m

• 1.283 x 10⁻⁸ m

• 1.283 x 10⁻⁶ m

• 1.283 x 10⁻⁷ m

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NGSS.HS-PS4-1

NGSS.HS-PS4-3

Based on the diagram , calculate the energy for blue line.

•   4.58 x 10^–19 J

•   – 4.58 x 10^–19 J

•    – 4.58 x 10^–18 J

• 4.58 x 10^–18 J

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NGSS.HS-PS3-1

Choose the line with the shortest wavelength.

• E

• A

• D

• C

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NGSS.HS-PS4-1

Determine the transition of line C.

• n=4 to n=1

• n=5 to n=2

• n=6 to n=3

• n=7 to n=4

The photon emitted in a Balmer series has wavelength of 410.2 nm, what is the value of n for the higher energy level?

• 6

• 7

• 8

• 9

Tags

NGSS.HS-PS4-3

Choose line with the largest energy emitted.

• Red

• Green

• Blue

• Violet

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NGSS.HS-PS4-1

NGSS.HS-PS4-3