Deck 4: The Modern Model of the Atom

Question 1

How many valence electrons are in silicon?

A) 2
B) 4
C) 5
D) 7

Answer 1

4

Question 2

In a single atom, what is the maximum number of electrons that can have quantum number n = 4?

A) 10
B) 14
C) 18
D) 32

Answer 2

32

Question 3

The correct order of increasing energy in the following subshells is:

A) 2p, 3s, 4s, 3p, 3d
B) 2p, 3s, 3p, 4s, 3d
C) 2p, 3s, 3p, 3d, 4s
D) 2p, 3s, 3d, 3p, 4s

Answer 3

2p, 3s, 3p, 4s, 3d

Question 4

Which of the following subshells appear in the second shell?

A) s
B) s, p
C) s, p, d
D) p

Question 5

Which is the correct electronic configuration for Fe (atomic number 26) in the ground state?

A) 1s²2s²2p⁶3s²3p⁶4s²3d⁶
B) 1s²2s²2p⁶3s²3p⁶3d⁸
C) 1s²2s²2p⁶3s²3p⁶3d⁶4s²
D) 1s²2s²2p⁶3s²3p⁶4s²4p⁶

Question 6

What is the wavelength (in meters) of radio waves that have a frequency of 89.9 MHz? (wavelength × frequency = speed of light; speed of light = 3.0 × 10⁸ meters/sec.)

A) 3.3 centimeters
B) 2.7 × 10¹⁶ millimeters
C) 0.30 meters
D) 3.3 meters

Question 7

The units of h (Planck's constant) are ________.

A) J.s
B) J/s
C) m/s
D) J/nm

Question 8

Which feature of Bohr's atomic model is no longer accepted as true by today's scientists?

A) Most of an atom's mass is located within the nucleus.
B) Electrons have only certain, allowed energy values.
C) Electrons orbit the nucleus in fixed circular paths.
D) Each principal quantum level can hold a maximum of 2N₂ electrons.

Question 9

What is the maximum number of electrons in a 3p subshell?

A) 10
B) 3
C) 6
D) 5

Question 10

What is the number of outer shell electrons in fluorine?

A) 2
B) 5
C) 7
D) 9

Question 11

Which type of electromagnetic radiation is composed of photons having the largest energy?

A) microwaves
B) radio waves
C) x rays
D) gamma rays

Question 12

Which of the following subshells does not appear in the third shell?

A) s
B) p
C) d
D) f

Question 13

For the electron of a hydrogen atom, which of the following quantum "jumps" requires the most energy?

A) from n = 3 to n = 4
B) from n = 2 to n = 3
C) from n = 4 to n = 5
D) from n = 1 to n = 2

Question 14

Which is the correct electronic configuration for Se (atomic number 34) in the ground state?

A) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁴
B) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s⁰4p⁶
C) 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴
D) 1s²2s²2p⁶3s²3p⁶3d¹⁰4s⁰3p⁶

Question 15

What is the main difference between "classical physics" and "quantum physics"?

A) Quantum physics requires the speed of light to be a constant value.
B) Classical physics requires that only certain, allowed values for energy be used.
C) Quantum physics requires that only certain, allowed values for energy be used.
D) Quantum physics can only describe the behavior of very small objects, like atoms and molecules.

Question 16

What is the maximum number of electrons in an 4f subshell?

A) 14
B) 10
C) 7
D) 28

Question 17

Calculate the energy in joules of microwave radiation of wavelength 12.7 centimeters. (E = hν, h = 6.63 × 10^-34 J.sec; speed of light = wavelength × ν, speed of light = 3.0 × 10⁸ meters/sec.)

A) 4.9 × 10¹⁹ J
B) 7.3 × 10^-19 J
C) 3.6 × 10^-18 J
D) 1.6 × 10^-24 J

Question 18

Which of the following elements has the electronic configuration: 1s²2s²2p⁶3s²3p³?

A) Al
B) P
C) S
D) Si

Question 19

Which color light is composed of photons having the largest energy?

A) blue
B) green
C) yellow
D) red

Question 20

Which color light is composed of photons having the longest wavelength?

A) blue
B) green
C) yellow
D) red

Question 21

Atoms in which of the following groups will likely gain three electrons?

A) IIIA
B) VA
C) VIIA
D) both A and B

Question 22

A non-metal is an element that tends to ________ valence electrons in chemical reactions, becoming a(n) ________ in the process.

A) lose; cation
B) gain; anion
C) lose; anion
D) gain; cation

Question 23

The likely formula of the compound formed between Ca and O is ________.

A) Ca₂O
B) CaO₂
C) Ca₂O₃
D) CaO

Question 24

Which of the following elements is the smallest size chalcogen?

A) H
B) N
C) O
D) F

Question 25

What is the trend in atomic size in the series of Group IIA elements Be through Ra?

A) Atomic size increases in this series.
B) Atomic size decreases in this series.
C) Atomic size remains unchanged in this series.
D) Atomic size increases at first, then decreases in this series.

Question 26

Which of the following anions will have the electronic configuration 1s²2s²2p⁶3s²3p⁶?

A) K^1-
B) Cl^1-
C) S^2-
D) Br^1-

Question 27

The likely formula of the compound formed between Al and S is ________.

A) AL₂S
B) AlS₂
C) AL₂S₃
D) AL₃S₂

Question 28

The total number of electrons that can be accommodated in 3d is ________.

A) 5
B) 2
C) 6
D) 10

Question 29

Below are four pairs of atoms and ions. In which pair is the larger of the two species written first?

A) S^2- and S
B) Cu²⁺ and Cu
C) O and O^₂-
D) Cr³⁺ and Cr

Question 30

Which of the following cations will have the electronic configuration 1s²2s²2p⁶3s²3p⁶?

A) CO^₂+
B) Ca^₂+
C) Sc¹⁺
D) Cl¹⁺

Question 31

9) A metal is an element that tends to ________ valence electrons in chemical reactions, becoming a(n) ________ in the process.

A) lose; cation
B) gain; anion
C) lose; anion
D) gain; cation

Question 32

The size of boron is ________ than that of oxygen and ________ than that of aluminum.

A) smaller; larger
B) larger; larger
C) smaller; smaller
D) larger; smaller

Question 33

Which of the following elements never obeys the octet rule?

A) hydrogen
B) nitrogen
C) carbon
D) chlorine

Question 34

Which of the following ions does not have the neon electron configuration?

A) S⁴⁺
B) Mg²⁺
C) O^₂-
D) AL^₃+

Question 35

Which of the following ions have electronic configuration: 1s22s22p63s23p6?

A) F^-
B) Mg⁺²
C) P^-3
D) S^-

Question 36

Which of the following ions does not match the electronic configuration 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶?

A) Br^1-
B) Sr²⁺
C) As^3-
D) Se²⁺

Question 37

Which of the following ions does not include [Kr] in its shorthand electron configuration?

A) Sr²⁺
B) Te^2-
C) Se⁶⁺
D) Mo

Question 38

The relative ratio of atoms in the binary compound AlxOy is ________.

A) x = 2, y = 3
B) x = 3, y = 2
C) x = 5, y = 2
D) x = 2, y = 5

Question 39

The valence shell ________.

A) always contains eight electrons.
B) is the lowest energy shell in an atom.
C) contains electrons in the outermost shell.
D) is always the same for anions and cations.

Question 40

Atoms in which of the following groups will likely lose three electrons?

A) IIIA
B) VA
C) IIA
D) IVA

Question 41

The only possible way for an excited state electron to return to the ground state is to emit energy in the form of visible light.

Question 42

The wavelengths in infrared radiation are larger than those of the ultraviolet region.

Question 43

The scientist credited with developing the current mathematical model of the atom is ________.

A) Bohr
B) Schrödinger
C) Planck
D) Rutherford

Question 44

Predict the formula of the compound produced in a reaction between barium (Ba) and oxygen (O).

A) BaO₂
B) BaO
C) BaO₃
D) Ba₂O₃

Question 45

The wavelength is the distance measured between two crests, but not between two troughs.

Question 46

Blue visible light has a higher frequency than red visible light.

Question 47

Which orbital is a spherical shape?

A) 2s
B) 3p
C) 4d
D) 5f

Question 48

Which s orbital is the largest?

A) 1s
B) 2s
C) 3s
D) 4s

Question 49

Microwave is radiation of a lower energy than that of visible light.

Question 50

Which of the following elements is the largest size halogen?

A) He
B) I
C) F
D) Kr

Question 51

Blue visible light has a lower energy than red visible light.

Question 52

The speed of light is about 186,000 miles per minute.

Question 53

Both the energy and the wavelength of electromagnetic radiation are related by the constants c, the speed of light, and Planck's constant, h.

Question 54

The elements of Group VIIIA are almost entirely non-reactive with any of the other chemical elements. Which of the following statements best explains this observed behavior?

A) Group VIIIA elements comply with the octet rule.
B) Group VIIIA elements are so rare that no one has ever studied their reactive properties in any detail.
C) Group VIIIA elements are all gases, and gases are generally non-reactive.
D) No explanation given here can explain why Group VIIIA elements do not react with any of the other chemical elements.

Question 55

Which of the following has attained a noble gas electronic configuration?

A) SI^₄+
B) Cl¹⁺
C) AL^₃-
D) Cr³⁺

Question 56

The frequency of infrared radiation that has a wavelength of 1.5 × 10³ nm is 2.0 × 10⁷ sec^-1 (given: speed of light = 3.0 × 10⁸ m/sec).

Question 57

The ion that has 14 protons and 18 electrons is ________.

A) SI^₄+
B) SI^₄-
C) N^₄+
D) N^₄-

Question 58

Predict the formula of the compound produced in a reaction between lithium (Li) and phosphorus (P).

A) LiP
B) LI₂P₃
C) LiP₂
D) LI₃P

Question 59

Which orbital is dumbbell-shaped?

A) 2s
B) 3p
C) 4d
D) 5g

Question 60

Red light is the lowest frequency of light in the visible region of the electromagnetic spectrum.

Question 61

The f-block represents a region on the periodic table that is ten elements wide.

Question 62

In Bohr's theory, electrons can jump from one energy level to another or from one orbit to another.

Question 63

H⁺ has one electron.

Question 64

The number of electrons in the valence shell of an atom is equal to the group number for the representative elements.

Question 65

The atomic radius can be measured by x-ray diffraction.

Question 66

Should an oxygen atom (O) gain two electrons, it would then have the same ground state electronic configuration as an atom of neon (Ne), thus satisfying the octet rule.

Question 67

Atoms tend to increase in size as one moves from left to right across a period.

Question 68

Halogens have large electron affinity values.

Question 69

The p-block represents a region on the periodic table that is six elements wide.

Question 70

A non-metal is an element that tends to gain valence electrons in chemical reactions becoming a cation in the process.

Question 71

The correct shortcut for writing the electronic configuration of Sr is [Ar]4s².

Question 72

The n = 5 principal energy level can hold a maximum of 25 electrons.

Question 73

Phosphorus atoms have five valence electrons.

Question 74

The observed line spectra of electrically excited gas samples tend to support the notion that electron energies are quantized.

Question 75

An electron in the excited state does not necessarily return to a ground state in a single jump.

Question 76

If an element has a small electron affinity value it can easily lose an electron.

Question 77

Once an atom gets excited, it may remain in that excited state indefinitely.

Question 78

The atom size decreases as one proceeds from top to bottom down a group.

Question 79

Metals generally become more reactive as one proceeds down a column (group).

Question 80

+1 is the only charge sodium ions normally have.