Chemistry Questions-Chapter 9

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Which of the statements about light is FALSE?
A) Light travels through space at a speed of 3.00 × 108 m/s.
B) Light travels much faster than sound.
C) A packet of light energy is called a photon.
D) A characteristic feature of light that determines its color is its wavelength.
E) All of the above statements are true.

E) All of the above statements are true.

The distance between adjacent wave crests is called:

wavelength.

The number of cycles of a wave that passes a stationary point in one second is called its:

frequency.

Which among the following statements is TRUE?
A) The wavelength of light is inversely related to its energy.
B) As the energy increases, the frequency of radiation decreases.
C) As the wavelength increases, the frequency also increases.
D) Red light has a shorter wavelength than violet light.
E) none of the above

The wavelength of light is inversely related to its energy.

How are wavelength and frequency of light related?

Wavelength increases as the frequency decreases.

Which color of the visible spectrum has the shortest wavelength (400 nm)?

violet

Which color of the visible spectrum has the longest wavelength (750 nm)?

red

violet

Which color of the visible spectrum has photons with the most energy?

What is the correct order of the electromagnetic spectrum from shortest wavelength to longest?
A) Gamma Rays→X-rays→Ultraviolet Radiation→Visible Light→Infrared Radiation→Microwaves→Radio Waves
B) Visible Light→Infrared Radiation→Microwaves→Radio Waves→Gamma Rays→X-rays→Ultraviolet Radiation
C) Radio Waves→X-rays→Ultraviolet Radiation→Visible Light→Infrared Radiation→Microwaves→Gamma Rays
D) Gamma Rays→X-rays→Visible Light→Ultraviolet Radiation→Infrared Radiation→Microwaves→Radio Waves
E) Gamma Rays→X-rays→Infrared Radiation→Visible Light→Ultraviolet Radiation→Microwaves→Radio Waves

Gamma Rays→X-rays→Ultraviolet Radiation→Visible Light→Infrared Radiation→Microwaves→Radio Waves

Which form of electromagnetic radiation has the shortest wavelength?

Gamma Rays

Which form of electromagnetic radiation has the longest wavelength?

Radio Waves

Gamma Rays

Which form of electromagnetic radiation has the highest frequency?

Radio Waves

Which form of electromagnetic radiation has the lowest frequency?

Which form of electromagnetic radiation has photons with the highest energy?

Gamma Rays

Which form of electromagnetic radiation has photons with the lowest energy?

Radio Waves

What happens to an atom when it absorbs energy?

The atom re-emits the energy as light.

When sunlight is passed through a prism, what is observed?

continuous spectrum

When neon light is passed through a prism, what is observed?

white light

Which statement below does NOT follow the Bohr Model?
A) When energy is absorbed by atoms, the electrons are promoted to higher-energy orbits.
B) When an atom emits light, electrons fall from a higher orbit into a lower orbit.
C) The energy emitted from a relaxing electron can have any wavelength.
D) Electrons exist in specific, quantized orbits.
E) none of the above

The energy emitted from a relaxing electron can have any wavelength.

Which of the following statements about the quantum-mechanical model is FALSE?
A) Orbitals are a probability map of finding electrons.
B) Electrons do not behave as particles.
C) Orbitals are specific paths electrons follow.
D) Electron paths cannot be described exactly.
E) All of the above are correct statements.

Orbitals are specific paths electrons follow.

The principal quantum number (n):

specifies the principal shell of the orbital.

The subshell letter:

specifies the 3-D shape of the orbital.

How many subshells are there in the n = 4 principal shell?

4

How many subshells are there in the n = 2 principal shell?

2

The n = ________ principal shell is the lowest that may contain a d-subshell.

3

Which subshell letter corresponds to a spherical orbital?

s

Which subshell letter corresponds to a 4-leaf clover orbital pattern?

d

Which statement is NOT true about "p" orbitals?
A) A subshell contains three "p" orbitals.
B) These orbitals are shaped like dumbbells.
C) A 3p orbital has a higher energy than a 2p orbital.
D) All three of these statements are true.
E) none of the above

All three of these statements are true.

The "d" subshell can hold a maximum of ________ electrons.

10

2

How many electrons can exist in an orbital?

The lowest energy orbital in the quantum-mechanical model is the:

1s orbital.

"When filling orbitals of equal energy, electrons fill them singly first with parallel spins." This is known as

Hund’s rule.

The subshell that has three orbitals and can hold up to six electrons is the:

p subshell

The subshell that has five orbitals and can hold up to ten electrons is the

d subshell

Which orbital would the electron of a ground state hydrogen atom occupy?

1s

2

How many electrons are unpaired in the orbitals of carbon?

How many electrons are unpaired in the orbitals of nitrogen?

3

An accepted abbreviation format is to write an electron configuration that includes a noble gas symbol in brackets. If you were writing an electron configuration for a bromine atom, which elemental symbol would you place in the bracket?

Ar

Which element is represented by the electron configuration 1s22s22p2?

C

What is the electron configuration for Kr?
A) 1s22s22p63s23p63d104s24p6
B) 1s22s22p63s23p64s23d104p1
C) 1s22s22p63s23p53d104s24p1
D) 1s22s22p63s23p64s24d104p1
E) none of the above

1s22s22p63s23p64s23d104p6

What is the electron configuration for Ga?

1s22s22p63s23p64s23d104p1

What is the electron configuration for P?

[Ne]3s23p3

The element with a completely filled p-subshell is:

Ar.

What is the element in which at least one electron is in the d-orbital?

Sc

How many core electrons are in a chlorine atom?

10

How many valence electrons are in a chlorine atom?

7

What do the alkali metals all have in common?
A) They all undergo similar reactions.
B) They all have similar physical properties.
C) They all form +1 ions.
D) They all have the same number of valence electrons.
E) all of the above

all of the above

Which of the following elements has the electron configuration of 3s23p4 in its outermost shell?

S

Chlorine and bromine have very similar chemical properties. This is best explained by the fact that both elements

have the same number of valence electrons.

Consider the electron configuration of the ion to determine which ion shown below has an incorrect ionic charge?

Al³-

The size of an atom generally increases:

down a group and from right to left across a period.

Which of the following elements has the lowest ionization energy?

Rb

Which of the following elements has the highest ionization energy?

Ne

Which of the following atoms is the largest?

Cs

Which of the following atoms is the smallest?

Ne

Which of the following atoms has the least metallic character?

Li

Cs

Which of the following atoms has the greatest metallic character?

Which color of visible light has a wavelength in between that of blue and violet light?

indigo

Which one of the following types of electromagnetic radiation has a higher energy per photon than visible radiation?

ultraviolet

How many core electrons are in a ground state atom of arsenic?

28

Which of the atoms represented below is the largest in size?

Bi

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