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Topic 2 SL Chemistry Atomic Structure

Total questions: 63

Worksheet time: 4hrs 18mins

Name
Class
Date
1.

Which technique is used to detect the isotopes of an element?

a)

Mass spectrometry

b)

Infrared spectroscopy

c)

Titration

d)

Recrystallization

2.

What is represented by A in this isotope?

a)

Number of electrons

b)

Number of neutrons

c)

Number of nucleons

d)

Number of protons

3.

Which is correct for this isotope?

a)

16 protons; 18 neutrons; 14 electrons

b)

18 protons; 16 neutrons; 18 electrons

c)

16 protons; 18 neutrons; 16 electrons

d)

16 protons; 18 neutrons; 18 electrons

4.

Which statement about 56Fe3+ and 54Fe2+ is correct?

a)

Both have the same numbers of protons and electrons.

b)

Both have the same number of protons.

c)

Both have the same number of neutrons.

d)

Both have the same numbers of protons and neutrons.

5.

Which shows the number of subatomic particles in 31P3− ?

a)

A

b)

B

c)

C

d)

D

6.

What is the composition of the nucleus of 26Mg?

a)

A

b)

B

c)

C

d)

D

7.

What is the number of protons and the number of neutrons in 131I?

a)

A

b)

B

c)

C

d)

D

8.

In which set do all the species contain more electrons than neutrons?

a)

14N, 16O, 11C

b)

14N, 16O, 11C4–

c)

14N3–, 16O2–, 11C

d)

14N3–, 16O2–, 11C4+

9.

What does this symbol represent?

a)

An ion with 12 protons and 24 neutrons

b)

An ion with 14 protons and 24 neutrons

c)

An ion with 12 protons and 12 neutrons

d)

An ion with 12 protons and 22 neutrons

10.

Which is correct for the chromium isotope?

a)

24 neutrons and 53 nucleons

b)

24 protons and 29 nucleons

c)

24 protons and 29 neutrons

d)

24 electrons and 53 neutrons

11.

Which representation would be correct for a species, Z, which has 31 protons, 40 neutrons and 28 electrons?

a)

A

b)

B

c)

C

d)

D

12.

Which statement about the isotopes of nitrogen is correct?

a)

A

b)

B

c)

C

d)

D

13.

Which statement is correct for this ion?

a)

The ion contains 15 subatomic particles in the nucleus.

b)

The ion contains more protons than neutrons in the nucleus.

c)

The ion has an electron arrangement of 2,2.

d)

Most of the total volume of the ion is empty space.

14.

Which ion will be deflected most in a mass spectrometer?

a)

16O+

b)

16O2+

c)

18O+

d)

18O2+

15.

What does this represent?

a)

An isotope of Te with 24 neutrons

b)

An isotope of Te with 24 electrons

c)

An isotope of Cr with 28 protons

d)

An isotope of Cr with 28 neutrons

16.

Which statements about the isotopes of an element are correct?

I. They have the same chemical properties.

II. They have different physical properties.

III. They have the same number of protons and electrons.

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

17.

Which is an isotope of 24Mg?

a)

A

b)

B

c)

C

d)

D

18.

What are the numbers of neutrons and electrons in the iodine ion, 125I+ ?

a)

A

b)

B

c)

C

d)

D

19.

What is the correct number of each particle in an oxygen ion, 18O2-?

a)

A

b)

B

c)

C

d)

D

20.

Which subatomic particles are located in the nucleus of an atom?

a)

Protons and electrons

b)

Neutrons and electrons

c)

Protons and neutrons

d)

Protons, neutrons and electrons

21.

A sample of zinc has the above composition:

What is the relative atomic mass of the zinc in this sample?

a)

64.5

b)

65.0

c)

65.9

d)

66.4

22.

Which statement about the numbers of protons, electrons and neutrons in a neutral atom is always correct?

a)

The number of neutrons minus the number of electrons is zero.

b)

The number of protons plus the number of neutrons equals the number of electrons.

c)

The number of protons equals the number of electrons.

d)

The number of neutrons equals the number of protons.

23.

Which quantities are the same for all atoms of chlorine?

I. Number of protons

II. Number of neutrons

III. Number of electrons

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

24.

Consider the relative abundance of the isotopes of element X. What is the relative atomic mass of X?

a)

24

b)

25

c)

Between 24 and 25

d)

Between 25 and 26

25.

Which statement about these two species of copper is correct?

a)

Both species have the same number of protons.

b)

Both species have the same number of electrons.

c)

Both species have the same number of neutrons.

d)

Both species have the same electron arrangement.

26.

How many electrons does this ion contain?

a)

12

b)

15

c)

16

d)

18

27.

How many protons, neutrons and electrons are present in each atom of 31P ?

a)

A

b)

B

c)

C

d)

D

28.

What is the atomic number of a neutral atom which has 51 neutrons and 40 electrons?

a)

40

b)

51

c)

91

d)

131

29.

What is the relative atomic mass of an element with the following mass spectrum?

a)

24

b)

25

c)

26

d)

27

30.

This table shows the number of protons, neutrons and electrons present in five species. Which two species are isotopes of the same element?

a)

X and W

b)

Y and Z

c)

Z and W

d)

W and Q

31.

Which represents the shape of an s atomic orbital?

a)

A

b)

B

c)

C

d)

D

32.

What is the ground state electron configuration of an atom of chromium, Cr (Z = 24)?

a)

A

b)

B

c)

C

d)

D

33.

Which transition in the hydrogen atom emits visible light?

a)

n = 1 to n = 2

b)

n = 2 to n = 3

c)

n = 2 to n = 1

d)

n = 3 to n = 2

34.

Which statements are correct for the emission spectrum of hydrogen?

I. The lines converge at higher frequencies.

II. Electron transitions to n = 2 are responsible for lines in the visible region.

III. Lines are produced when electrons move from lower to higher energy levels.

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

35.

Which are correct statements about the emission spectrum of hydrogen in the visible region?

I. The red line has a lower energy than the blue line.

II. The lines converge at longer wavelength.

III. The frequency of the blue line is greater than the frequency of the red line.

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

36.

Which electron transition in the hydrogen atom emission spectrum emits radiation with the longest wavelength?

a)

n = 2 → n = 1

b)

n = 1 → n = 2

c)

n = 4 → n = 1

d)

n = 3 → n = 2

37.

The full electron configuration of an element is:

1s22s22p63s23p2

To which group and period does the element belong?

a)

A

b)

B

c)

C

d)

D

38.

Which electron transition emits radiation of the longest wavelength?

a)

A

b)

B

c)

C

d)

D

39.

Which is correct for the line emission spectrum for hydrogen?

a)

Line M has a higher energy than line N.

b)

Line N has a lower frequency than line M.

c)

Line M has a longer wavelength than line N.

d)

Lines converge at lower energy.

40.

What is the condensed electron configuration of the Fe2+ ion?

a)

[Ar]3d6

b)

[Ar]3d44s2

c)

[Ar]3d54s1

d)

[Ar]3d64s2

41.

Which electron configuration is correct for the selenide ion, Se2−?

a)

1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p4

b)

1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p6

c)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4

d)

1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6

42.

Ultraviolet radiation has a shorter wavelength than infrared radiation. How does the frequency and energy of ultraviolet radiation compare with infrared radiation?

a)

A

b)

B

c)

C

d)

D

43.

Some possible electron transitions in a hydrogen atom are shown below. Which letter represents the electron transition with the highest energy in the emission spectrum?

a)

A

b)

B

c)

C

d)

D

44.

The diagram represents the emission spectrum of hydrogen. Groups of arrows are labelled W, X and Y.

Which statement is correct?

a)

The arrows represent the transition of electrons to different energy levels when heat is supplied.

b)

The arrows of W represent emission in the UV region.

c)

The smallest arrow of X represents a violet line in the emission spectrum.

d)

The arrows of Y represent emission of electromagnetic waves with higher energy than those represented by X and W.

45.

Which species have the same electron arrangements?

I. O2-, F-, Ne

II. Li+, Na+, K+

III. S2-, Ar, K+

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

46.

Which statement about the periodic table is correct?

a)

The elements with atomic numbers 8, 16 and 34 have the same number of main energy levels.

b)

The elements with atomic numbers 8, 9 and 10 have similar chemical properties.

c)

The elements with atomic numbers 20, 21 and 22 are in the same group.

d)

The elements with atomic numbers 20, 38 and 56 have the same number of electrons in their outer energy level.

47.

Which electron configurations do not follow the Hund's rule?

a)

A

b)

B

c)

C

d)

D

48.

Which statement correctly describes the atomic emission spectrum of hydrogen?

a)

It is a continuous spectrum converging at high frequency.

b)

It is a line spectrum converging at high frequency.

c)

It is a continuous spectrum converging at low frequency.

d)

It is a line spectrum converging at low frequency.

49.

Which diagram shows a pattern similar to the emission spectrum of hydrogen?

a)

A

b)

B

c)

C

d)

D

50.

What is the abbreviated electron configuration of the telluride ion, Te2−?

a)

[Kr] 5s25d105p6

b)

[Kr] 5s24d105p2

c)

[Kr] 5s24d105p4

d)

[Kr]5s24d105p6

51.

Which species has the electron configuration of 1s22s22p63s23p63d8?

a)

Ni

b)

Ni2+

c)

Fe

d)

Cu2+

52.

Which statement about the electromagnetic spectrum is correct?

a)

Infrared light has a shorter wavelength than ultraviolet light.

b)

Visible light has a shorter wavelength than ultraviolet light.

c)

The frequency of visible light is higher than the frequency of infrared light.

d)

The energy of infrared light is higher than the energy of visible light.

53.

What is the name of the type of spectrum consisting only of specific wavelengths?

a)

Electromagnetic

b)

Continuous

c)

Line

d)

Mass

54.

Which statements are correct for silicon?I. Its electron arrangement is 2,8,4.

II. It has four electrons in its highest occupied energy level.

III. In the solid state, each silicon atom is covalently bonded to four other silicon atoms in a tetrahedral arrangement.

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

55.

In the electromagnetic spectrum, which will have the shortest wavelength and the greatest energy?

a)

A

b)

B

c)

C

d)

D

56.

Which statement about the electromagnetic spectrum is not correct?

a)

The wavelength of ultraviolet radiation is shorter than infrared radiation.

b)

The frequency of visible radiation is higher than the frequency of ultraviolet radiation.

c)

The energy of infrared radiation is lower than the energy of ultraviolet radiation.

d)

Wavelength is inversely proportional to frequency.

57.

In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum?

a)

n=2 → n=1

b)

n=3 → n=2

c)

n=2 → n=3

d)

n=∞ → n=1

58.

What is the electron configuration of vanadium?

a)

1s22s22p63s23p63d24s3

b)

1s22s22p63s23p63d34s2.

c)

1s22s22p63s23p63d44s1

d)

1s22s22p63s23p63d5

59.

What is the electron arrangement of the Mg2+

ion?

a)

2, 2

b)

2, 8

c)

2, 8, 2

d)

2, 8, 8

60.

Which species have the same number of electrons?

I. S2-

II. Cl-

III. Ne

a)

I and II only

b)

I and III only

c)

II and III only

d)

I, II and III

61.

Which is correct for the following regions of the electromagnetic spectrum?

a)

A

b)

B

c)

C

d)

D

62.

What is the order of increasing energy of the orbitals within a single energy level?

a)

d<s<f<p

b)

s<p<d<f

c)

p<s<f<d

d)

f<d<p<s

63.

What is the electron configuration of the Cr2+

ion?

a)

[Ar] 3d54s1

b)

[Ar] 3d34s1

c)

[Ar] 3d64s1

d)

[Ar] 3d44s0

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