Which statement about time of flight mass spectrometry is correct?

The current in the detector is proportional to the ion abundance

Sample particles gain electrons to form positive ions

Particles are detected in the order of their kinetic energies

Ions are accelerated by a magnetic field

Chlorine exists as two isotopes 35 Cl and 37 Cl in the ratio 3:1 Which statement about peaks in the mass spectrum of Cl 2 is correct?

Peaks at m/z = 70, 72 and 74 in the ratio 9:6:1

Peaks at m/z = 70 and 74 in the ratio 3:1

Peaks at m/z = 70, 72 and 74 in the ratio 9:3:1

Peaks at m/z = 70 and 72 in the ratio 3:1

Bromine exists as two isotopes 79 Br and 81 Br, which are found in almost equal abundance. Which of the statements is correct?

The mass spectrum of C 3 H 7 Br has two molecular ion peaks at 122 and 124

The first ionisation energy of 79 Br is less than the first ionisation energy of 81 Br

The atomic radius of 79 Br is less than the atomic radius of 81 Br

79 Br is more reactive than 81 Br

Ions of two isotopes of iron are 53 Fe 2+ 56 Fe 2+ Which statement is correct?

After acceleration to the same kinetic energy 56 Fe 2+ will move more slowly than 53 Fe 2+

The ions of both the isotopes have the electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6

The ions of both the isotopes contains 26 neutrons

53 Fe 2+ has fewer protons than 56 Fe 2+

Bromine exists as two isotopes 79 Br and 81 Br, which are found in almost equal abundance. Which of the statements is correct?

The mass spectrum of C 3 H 7 Br has two molecular ion peaks at 122 and 124

The first ionisation energy of 79 Br is less than the first ionisation energy of 81 Br

The atomic radius of 79 Br is less than the atomic radius of 81 Br

79 Br is more reactive than 81 Br

Ions of two isotopes of iron are 53 Fe 2+ 56 Fe 2+ Which statement is correct?

After acceleration to the same kinetic energy 56 Fe 2+ will move more slowly than 53 Fe 2+

The ions of both the isotopes have the electronic configuration 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 6

The ions of both the isotopes contains 26 neutrons

53 Fe 2+ has fewer protons than 56 Fe 2+

Which one of the following statements is not correct?

The first ionisation energy of iron is greater than its second ionisation energy.

The magnitude of the lattice enthalpy of magnesium oxide is greater than that of barium oxide.

The oxidation state of iron in [Fe(CN) 6 ] 3− is greater than the oxidation state of copper in [CuCl 2 ] −

The boiling point of C 3 H 8 is lower than that of CH 3 CH 2 OH

Which one of the following explains why boron has a lower first ionisation energy than beryllium?

In boron the 2 p electron occupies a higher energy level than a 2 s electron.

A boron atom is smaller than a beryllium atom.

In beryllium all the electrons are paired in full sub-shells.

A beryllium atom has fewer protons than a boron atom.

In which one of the following pairs is the first ionisation energy of element Y greater than that of element X ?

X : 1s 2 2s 2 Y : ls 2 2s 2 2p 1

X : 1s 2 2s 2 2p 3 Y : ls 2 2s 2 2p 4

X : 1s 2 2s 2 2p 6 Y : ls 2 2s 2 2p 6 3s 1

Which one of the following is the electronic configuration of an element with a maximum oxidation state of +5?

1s 2 2s 2 2p 6 3s 2 3p 6 3d 7 4s 2

Which sample of liquid has the greatest volume?

1.20 g of dichloromethane (density = 1.33 g cm –3 )

500 mg of pentane (density = 0.63 g cm –3 )

650 mg of propan-1-ol (density = 0.80 g cm –3 )

1.30 g of trichloromethane (density = 1.48 g cm –3 )

Which of these contains the greatest number of atoms?

1.54 × 10 −4 kg of phosphorus

Which sample contains the most molecules? The Avogadro constant, L = 6.022 x 10 23 mol −1

2.10 × 10 22 molecules of methane, CH 4

Which of the following contains the most chloride ions?

30 cm 3 of 5.50 × 10 −2 mol dm −3 calcium chloride solution

15 cm 3 of 3.40 × 10 −2 mol dm −3 aluminium chloride solution

40 cm 3 of 2.30 × 10 −2 mol dm −3 hydrochloric acid

45 cm 3 of 2.20 × 10 −2 mol dm −3 sodium chloride solution

3.1 Physical Chemistry

Quiz

•

Chemistry

•

9th - 12th Grade

•

Practice Problem

•

Hard

•

NGSS

HS-PS1-2, HS-PS1-1, HS-PS1-4

+13

Standards-aligned

Stanton Wertjes

Used 108+ times

FREE Resource

Student preview

353 questions

Show all answers

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure. When He²⁺ particles were fired at a thin sheet of gold, most of the particles were detected at point P. What conclusion can be drawn from the detection of He²⁺ particles at point P?

Gold atoms contain electrons.

Gold atoms contain protons.

Gold atoms contain neutrons.

Gold atoms are mainly empty space.

When He²⁺ particles were fired at a thin sheet of gold, about 1 in 8000 of the particles were detected at point Q. What conclusion can be drawn from the detection of He²⁺ particles at point Q?

Gold atoms have a small, positive nucleus.

Gold atoms have electrons in orbitals.

Gold consists of ions in a sea of delocalised electrons.

Gold atoms have more protons than He2+ particles.

Which of these correctly shows the numbers of sub-atomic particles in a ⁴¹K⁺ ion?

Number of electrons: 19, Number of protons: 19, Number of neutrons: 20

Number of electrons: 18, Number of protons: 20, Number of neutrons: 21

Number of electrons: 18, Number of protons: 19, Number of neutrons: 22

Number of electrons: 19, Number of protons: 18, Number of neutrons: 23

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these correctly shows the numbers of sub-atomic particles in a ²¹Na⁺ ion?

Number of electrons: 11, Number of protons: 11, Number of neutrons: 10

Number of electrons: 10, Number of protons: 12, Number of neutrons: 9

Number of electrons: 10, Number of protons: 11, Number of neutrons: 10

Number of electrons: 11, Number of protons: 10, Number of neutrons: 11

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of these correctly shows the numbers of sub-atomic particles in a ⁴²Ca²⁺ ion?

Number of electrons: 20, Number of protons: 20, Number of neutrons: 22

Number of electrons: 18, Number of protons: 21, Number of neutrons: 21

Number of electrons: 18, Number of protons: 20, Number of neutrons: 22

Number of electrons: 20, Number of protons: 19, Number of neutrons: 23

Which species has the same number of electrons as the radical •CH₃?

CH₂

CH₃⁺

CH₃⁻

CH₄⁺

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the numbers of neutrons and electrons in the ⁵⁷Fe²⁺ ion?

Neutrons: 31, Electrons: 24

Neutrons: 57, Electrons: 24

Neutrons: 31, Electrons: 26

Neutrons: 57, Electrons: 28

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3.1 Physical Chemistry

353 questions

In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure. When He²⁺ particles were fired at a thin sheet of gold, most of the particles were detected at point P. What conclusion can be drawn from the detection of He²⁺ particles at point P?

When He²⁺ particles were fired at a thin sheet of gold, about 1 in 8000 of the particles were detected at point Q. What conclusion can be drawn from the detection of He²⁺ particles at point Q?

Which of these correctly shows the numbers of sub-atomic particles in a ⁴¹K⁺ ion?

Which of these correctly shows the numbers of sub-atomic particles in a ²¹Na⁺ ion?

Which of these correctly shows the numbers of sub-atomic particles in a ⁴²Ca²⁺ ion?

Which species has the same number of electrons as the radical •CH₃?

What are the numbers of neutrons and electrons in the ⁵⁷Fe²⁺ ion?

Which of these atoms has the largest atomic radius?

Which of these atoms has the smallest atomic radius?

Which of these atoms has the smallest atomic radius?

Create a free account and access millions of resources

Popular Resources on Wayground

Discover more resources for Chemistry

3.1 Physical Chemistry

353 questions

In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure. When He2+ particles were fired at a thin sheet of gold, most of the particles were detected at point P. What conclusion can be drawn from the detection of He2+ particles at point P?

When He2+ particles were fired at a thin sheet of gold, about 1 in 8000 of the particles were detected at point Q. What conclusion can be drawn from the detection of He2+ particles at point Q?

Which of these correctly shows the numbers of sub-atomic particles in a 41K+ ion?

Which of these correctly shows the numbers of sub-atomic particles in a 21Na+ ion?

Which of these correctly shows the numbers of sub-atomic particles in a 42Ca2+ ion?

Which species has the same number of electrons as the radical •CH3?

What are the numbers of neutrons and electrons in the 57Fe2+ ion?

Which of these atoms has the largest atomic radius?

Which of these atoms has the smallest atomic radius?

Which of these atoms has the smallest atomic radius?

Create a free account and access millions of resources

Popular Resources on Wayground

Discover more resources for Chemistry

In the early twentieth century the apparatus shown in the diagram was used to investigate atomic structure. When He²⁺ particles were fired at a thin sheet of gold, most of the particles were detected at point P. What conclusion can be drawn from the detection of He²⁺ particles at point P?

When He²⁺ particles were fired at a thin sheet of gold, about 1 in 8000 of the particles were detected at point Q. What conclusion can be drawn from the detection of He²⁺ particles at point Q?

Which of these correctly shows the numbers of sub-atomic particles in a ⁴¹K⁺ ion?

Which of these correctly shows the numbers of sub-atomic particles in a ²¹Na⁺ ion?

Which of these correctly shows the numbers of sub-atomic particles in a ⁴²Ca²⁺ ion?

Which species has the same number of electrons as the radical •CH₃?

What are the numbers of neutrons and electrons in the ⁵⁷Fe²⁺ ion?