Physics

Which one of the following is the correct electronic configuration for carbon? A

Which one of the following is the correct electronic configuration for carbon? A

Which one of the following is the correct electronic configuration for carbon?
A) 1s2 2s2 2p2
B) 1s1 2p1
C) 1s1 2s2 2p1
D) 1s1 2s1 2p1
E) 1s2 2s2 2p4

ppk   942   1 Reply

lewis

Which one of the following is the correct electronic configuration for the sodiu

Which one of the following is the correct electronic configuration for the sodiu

Which one of the following is the correct electronic configuration for the sodium atom?
A) 1s1 2s2 3p6 2s2
B) 1s2 2s1 3p6 2s2
C) 1s1 2s2 2p6
D) 1s2 2s2 2p6 3s2
E) 1 s2 2 s2 2 p6 3 s1

ppk   696   1 Reply

lewis

n principle, a hologram is a result of which of the following properties of ligh

n principle, a hologram is a result of which of the following properties of ligh

n principle, a hologram is a result of which of the following properties of light?
A) Transmission
B) Interference
C) Refraction
D) Reflection
E) Dispersion

ppk   2088   1 Reply

lewis

What type of spectrum is produced when a high energy electron beam is incident o

What type of spectrum is produced when a high energy electron beam is incident o

What type of spectrum is produced when a high energy electron beam is incident on a metal target producing X-rays?
A) line spectrum
B) emission spectrum
C) absorption spectrum
D) continuous spectrum
E) line spectrum superimpo

ppk   1425   1 Reply

lewis

Which one of the following properties of the beam of light applies to a laser be

Which one of the following properties of the beam of light applies to a laser be

Which one of the following properties of the beam of light applies to a laser beam?
A) It is coherent.
B) It is incoherent.
C) It is diverging.
D) It is converging.
E) None of the other answers given is correct.

ppk   1971   1 Reply

lewis

The emission of light of lower frequency after illumination by a higher frequenc

The emission of light of lower frequency after illumination by a higher frequenc

The emission of light of lower frequency after illumination by a higher frequency is referred to as
A) absorption.
B) stimulated emission.
C) coherence.
D) phosphorescence.
E) fluorescence.

ppk   2230   1 Reply

lewis

Consider the Bohr Theory Hydrogen atom in the 2 nd excited state. (a)Determine

Consider the Bohr Theory Hydrogen atom in the 2 nd excited state. (a)Determine

Consider the Bohr Theory Hydrogen atom in the 2 nd excited state.
(a)   Determine the binding energy (eV) of the electron.
(b)   What is the radius of the electron orbit?
(c)   How far is it from the next higher excited orbit?

ppk   850   1 Reply

lewis

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series? A

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series? A

What value of n corresponds to a wavelength of 922.7 nm in the Paschen series?
A) 3
B) 5
C) 7
D) 9
E) 15

ppk   1593   1 Reply

star

The value of a wavelength in the Balmer series is 372.1 nm. What is the value of

The value of a wavelength in the Balmer series is 372.1 nm. What is the value of

The value of a wavelength in the Balmer series is 372.1 nm. What is the value of n?
A) 6
B) 3
C) 9
D) 10
E) 14

ppk   1288   1 Reply

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The value of a wavelength in the Balmer series is 410.2 nm. What is the value of

The value of a wavelength in the Balmer series is 410.2 nm. What is the value of

The value of a wavelength in the Balmer series is 410.2 nm. What is the value of n?
A) 4
B) 5
C) 6
D) 7
E) 9

ppk   2306   1 Reply

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What is the longest wavelength in the Lyman Series?

What is the longest wavelength in the Lyman Series?

What is the longest wavelength in the Lyman Series?
A) 45.60 nm
B) 91.20 nm
C) 121.5 nm
D) 240.1 nm
E) 365 nm

ppk   1883   1 Reply

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If a hydrogen atom originally in a state with principal quantum number n is exci

If a hydrogen atom originally in a state with principal quantum number n is exci

If a hydrogen atom originally in a state with principal quantum number n is excited to state  n' = 2n, then
A) its radius and binding energy will double.
B) its radius will quadruple and the binding energy will double.
C) its

ppk   1807   1 Reply

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Hydrogen atoms can emit four lines with visible colors from red to violet. T

Hydrogen atoms can emit four lines with visible colors from red to violet. T

Hydrogen atoms can emit four lines with visible colors from red to violet. These four visible lines emitted by hydrogen atoms are produced by electrons
A) that start in the n = 2 level.
B) that end up in the n = 2 level.
C) that end up

ppk   2251   1 Reply

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What range of electromagnetic radiation is emitted when transitions from higher

What range of electromagnetic radiation is emitted when transitions from higher

What range of electromagnetic radiation is emitted when transitions from higher levels into
n = 1 occur in a hydrogen atom?
A) Visible
B) Infrared
C) Microwave
D) X-Ray
E) Ultraviolet

ppk   1723   1 Reply

star

To which of the following values of n does the longest wavelength in the Balmer

To which of the following values of n does the longest wavelength in the Balmer

To which of the following values of n does the longest wavelength in the Balmer series correspond?
A) 3
B) 5
C) 1
D) 7

ppk   1550   1 Reply

star

What is the wavelength in the Balmer series corresponding to a value of n = 15?

What is the wavelength in the Balmer series corresponding to a value of n = 15?

What is the wavelength in the Balmer series corresponding to a value of n = 15?
A) 277.1 nm
B) 371.1 nm
C) 188.6 nm
D) 656 nm
E) 754.2 nm

ppk   1281   1 Reply

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What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?

What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?

What value of n corresponds to a wavelength of 91.7 nm in the Lyman series?
A) 1
B) 3
C) 5
D) 9
E) 13

ppk   1483   1 Reply

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What is the shortest wavelength of the Lyman series?

What is the shortest wavelength of the Lyman series?

What is the shortest wavelength of the Lyman series?
A) 91.16 nm
B) 45.60 nm
C) 121.5 nm
D) 204.1 nm
E) 365 nm

ppk   2453   1 Reply

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What is the longest wavelength in the Balmer series?

What is the longest wavelength in the Balmer series?

What is the longest wavelength in the Balmer series?
A) 240 nm
B) 328 nm
C) 365 nm
D) 656 nm
E) 820 nm

ppk   2315   1 Reply

star

What is the shortest wavelength in the Balmer series?

What is the shortest wavelength in the Balmer series?

What is the shortest wavelength in the Balmer series?
A) 328 nm
B) 365 nm
C) 456 nm
D) 656 nm
E) 820 nm

ppk   4774   1 Reply

star

In a hydrogen atom, the electron makes a transition from the n = 8 to the n = 3

In a hydrogen atom, the electron makes a transition from the n = 8 to the n = 3

In a hydrogen atom, the electron makes a transition from the n = 8 to the n = 3 state. What is the wavelength of the emitted photon?
A) 9.54 × 10-7 m
B) 1.13 × 10-6 m
C) 3.12 × 10-7 m
D) 4.52 × 10-6 m
E) 6.34 × 10-7 m

ppk   1669   1 Reply

star

What is the radius of the smallest Bohr orbit?

What is the radius of the smallest Bohr orbit?

What is the radius of the smallest Bohr orbit?
A) 2.14 × 10-9 m
B) 1.12 × 10-9 m
C) 1.56 × 10-11 m
D) 3.17 × 10-11 m
E) 5.29 × 10-11 m

ppk   1095   1 Reply

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What is the speed of an electron in the n = 4 Bohr orbit of the hydrogen atom? A

What is the speed of an electron in the n = 4 Bohr orbit of the hydrogen atom? A

What is the speed of an electron in the n = 4 Bohr orbit of the hydrogen atom?
A) 5.47 × 105 m/s
B) 310 × 105 m/s
C) 1.39 × 105 m/s
D) 1.78 × 105 m/s
E) 2.18 × 106 m/s

ppk   1418   1 Reply

star

What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydroge

What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydroge

What is the kinetic energy of an electron in the n = 2 Bohr orbit of the hydrogen atom?
A) 2.71 × 10-19 J
B) 3.20 × 10-19 J
C) 5.45 × 10-19 J
D) 6.10 × 10-19 J
E) 2.16 × 10-18 J

ppk   1066   1 Reply

how_mendel

The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 ×

The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 ×

The kinetic energy of an electron in a Bohr orbit of the hydrogen atom is 8.57 × 10-20 J. What is the radius of the orbit?
A) 1.35 × 10-9 m
B) 2.01 × 10-9 m
C) 2.64 × 10-9 m
D) 4.12 × 10-9 m
E) 5.29 × 10-11 m

ppk   1589   1 Reply

how_mendel

What is the wavelength of the photon emitted when an electron in a hydrogen atom

What is the wavelength of the photon emitted when an electron in a hydrogen atom

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 8 jumps to the final state nf = 2?
A) 205.1 nm
B) 104.0 nm
C) 388.8 nm
D) 486.2 nm
E) 610.0 nm

ppk   1142   1 Reply

how_mendel

What is the wavelength of the photon emitted when an electron in a hydrogen atom

What is the wavelength of the photon emitted when an electron in a hydrogen atom

What is the wavelength of the photon emitted when an electron in a hydrogen atom which is in the initial state ni = 4 jumps to the final state nf = 2?
A) 243.1 nm
B) 556.2 nm
C) 486.2 nm
D) 312.2 nm
E) 609.1 nm

ppk   1045   1 Reply

how_mendel

What is the wavelength of the emitted photon if an electron in the hydrogen atom

What is the wavelength of the emitted photon if an electron in the hydrogen atom

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from n = 2 state to the ground state?
A) 121.5 nm
B) 203.1 nm
C) 243.0 nm
D) 388.8 nm
E) 411.1 nm

ppk   975   1 Reply

how_mendel

What are Newton's Laws

What are Newton's Laws

Hey, I was just wondering if someone could list the three laws with a brief explanation, thanks.

pizzabo1   1650   5 Replies

mango

gravitation and orbits

gravitation and orbits

Pluto is still moving gracefully along in its orbit, unaware that astronomers
on the planet Earth decided in 2006 to reclassify it as a `dwarf planet' rather
than a `planet'. Pluto's orbit is more elliptical than any of the e

zdaven   862   N/A

zdaven

What is the wavelength of the emitted photon if an electron in the hydrogen atom

What is the wavelength of the emitted photon if an electron in the hydrogen atom

What is the wavelength of the emitted photon if an electron in the hydrogen atom makes a transition from the ni = 2 to the nf = 1 state?
A) 205.2 nm
B) 87.5 nm
C) 91.2 nm
D) 121.5 nm
E) 402.1 nm

ppk   1530   1 Reply

Fritz

The atomic number is equal to the number of what particles in the nucleus?

The atomic number is equal to the number of what particles in the nucleus?

The atomic number is equal to the number of what particles in the nucleus?
A) protons
B) neutrons
C) nucleons
D) electrons
E) positrons.

ppk   1096   1 Reply

star

The mass number is equal to the number of what particles in the nucleus?

The mass number is equal to the number of what particles in the nucleus?

The mass number is equal to the number of what particles in the nucleus?
A) protons
B) neutrons
C) nucleons
D) electrons
E) positrons.

ppk   967   1 Reply

star

The radius of a nucleus is proportional to what power of the mass number?

The radius of a nucleus is proportional to what power of the mass number?

The radius of a nucleus is proportional to what power of the mass number?
A) 1/2
B) 1/3
C) 1/4
D) 2/5
E) 3/8

ppk   1755   1 Reply

star

In beta decay, it is found that the energy of the emitted electrons varies and i

In beta decay, it is found that the energy of the emitted electrons varies and i

In beta decay, it is found that the energy of the emitted electrons varies and is always less than what is calculated on the basis of the parent and daughter nuclei. This is evidence for the existence of another particle called the
A) gluon.

ppk   1584   1 Reply

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Francium-223 decays to radium-223 by emitting what kind of nuclear radiation?

Francium-223 decays to radium-223 by emitting what kind of nuclear radiation?

Francium-223 decays to radium-223 by emitting what kind of nuclear radiation?
A) Alpha
B) Beta minus
C) Beta plus
D) Gamma
E) X-rays.

ppk   2328   1 Reply

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When an unstable nucleus decays by emitting an alpha particle, the atomic number

When an unstable nucleus decays by emitting an alpha particle, the atomic number

When an unstable nucleus decays by emitting an alpha particle, the atomic number of the nucleus
A) increases by 4.
B) increases by 2.
C) decreases by 2.
D) decreases by 4.
E) remains unchanged.

ppk   1004   1 Reply

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When an unstable nucleus decays by emitting an alpha particle, the atomic mass n

When an unstable nucleus decays by emitting an alpha particle, the atomic mass n

When an unstable nucleus decays by emitting an alpha particle, the atomic mass number of the nucleus
A) increases by 4.
B) increases by 2.
C) decreases by 2.
D) decreases by 4.
E) remains unchanged.

ppk   2175   1 Reply

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A fission reaction in which more neutrons are given off than are needed to initi

A fission reaction in which more neutrons are given off than are needed to initi

A fission reaction in which more neutrons are given off than are needed to initiate the reaction is called
A) a critical reaction.
B) a chain reaction.
C) a fusion reaction.
D) a neutron catastrophe.
E) a chemical reaction.

ppk   2583   1 Reply

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A fusion reaction works because the binding energy of the resulting nucleus

A fusion reaction works because the binding energy of the resulting nucleus

A fusion reaction works because the binding energy of the resulting nucleus
A) is greater than the binding energy of the original nuclei.
B) is equal to the binding energy of the original nuclei.
C) is less than the binding energy of t

ppk   3167   1 Reply

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