Structure 1. Models of the particulate nature of matter

1.1 Introduction to the particulate nature of matter

1.2 The nuclear atom

1.3 Electron configurations

1.4 The mole

1.5 Ideal gases

Structure 2. Models of bonding and structure

2.1 The ionic model

2.2 The covalent model

2.3 The metallic model

2.4 From models to materials

Structure 3. Classification of matter

3.1 The periodic table

3.2 Functional groups: Organic compounds

Reactivity 1. What drives chemical reactions?

1.1 Measuring enthalpy changes

1.2 Energy cycles

1.3 Energy from fuels

Reactivity 2. How much, how fast and how far?

2.1 Amount of chemical change

2.2 Rate of chemical change

2.3 Extent of chemical change

Reactivity 3. What are the mechanisms of chemical change?

3.1 Proton transfer reactions

3.2 Electron transfer reactions

3.3 Electron sharing reactions (Radicals)

3.4 Electron-pair sharing reactions

IB Chemistry HL 1.2 The nuclear atom Question Bank

[Maximum number: 3]

Chlorine undergoes many reactions.

(a)

(i)

The mass spectrum of chlorine is shown.

Outline the reason for the two peaks at m / z=35 and 37 .

[ 1 ]

(ii)

Explain the presence and relative abundance of the peak at m / z=74.

[ 2 ]

[Maximum number: 1]

There are many oxides of silver with the formula $\mathrm{Ag}_{x} \mathrm{O}_{y^{.}}$ All of them decompose into their elements when heated strongly.

(a)

Naturally occurring silver is composed of two stable isotopes, ${ }^{107} \mathrm{Ag}$ and ${ }^{109} \mathrm{Ag}$ .

The relative atomic mass of silver is 107.87 . Show that isotope ${ }^{107} \mathrm{Ag}$ is more abundant.

[ 1 ]

[Maximum number: 1]

Which of the following species have the same number of outer electrons?

The letters do not represent symbols of elements.
${ }_{12}^{24} \mathrm{~W}^{2+}$ ${ }^{31}{ }_{16} \mathrm{X}^{-}$ ${ }_{21}^{45} \mathrm{Y}^{2+}$ ${ }_{9}^{19} Z^{-}$

X and Y

X and W

Z and Y

Z and W

[Maximum number: 1]

Chlorine is a diatomic molecule that contains 75 % of ${ }^{35} \mathrm{Cl}$ and 25 % of ${ }^{37} \mathrm{Cl}$ .

Which graph shows the full mass spectrum of chlorine?

[Maximum number: 1]

Which stage of operation immediately follows ionization in the mass spectrometer?

Acceleration

Deflection

Detection

Vaporization

[Maximum number: 1]

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

10.2

10.5

10.8

11.0

[Maximum number: 1]

What is represented by " 2-" in ${ }_{Z}^{A} X^{2-}$ ?

loss of electron

gain of electron

loss of proton

gain of proton

[Maximum number: 1]

Which species has two more neutrons than electrons?
${ }_{3}^{6} \mathrm{Li}^{+}$ ${ }_{4}^{9} B e^{2+}$ ${ }_{11}^{23} \mathrm{Na}^{+}$ ${ }_{20}^{42} \mathrm{Ca}^{2+}$

${ }_{3}^{6} \mathrm{Li}^{+}$

${ }_{4}^{9} B e^{2+}$

${ }_{11}^{23} \mathrm{Na}^{+}$

${ }_{20}^{42} \mathrm{Ca}^{2+}$

[Maximum number: 1]

Which ion would be deflected the most in a mass spectrometer?

${ }^{35} \mathrm{Cl}^{+}(\mathrm{g})$

${ }^{37} \mathrm{Cl}^{+}(\mathrm{g})$

${ }^{35} \mathrm{Cl}^{2+}(\mathrm{g})$

${ }^{37} \mathrm{Cl}^{2+}(\mathrm{g})$

[Maximum number: 1]

What is the $\mathrm{A}_{r}$ of the element as determined from its mass spectrum below?

10.0

10.2

10.5

10.8

0 selected

Question 1

Question 1(a)

Question 1(a)(iv)

Question 1(a)(v)

Question 1

Question 1(b)

Question 2

Question 2

Question 4

Question 4

Question 4

Question 4

Question 4

Question 5