Structure 1. Models of the particulate nature of matter

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Introduction to the particulate nature of matter

Subtopic

Introduction to the particulate nature of matter under Structure 1. Models of the particulate nature of matter for Grade 12 IB.

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Preview questions (no answers)

1.
$Which of the following elements exists as a monatomic gas at room temperature?$
A. $Oxygen$
B. $Nitrogen$
C. $Helium$
D. $Chlorine$
2.
$In which state of matter are the inter-particle forces generally strongest?$
A. $Gas$
B. $Liquid$
C. $Solid$
D. $Aqueous$
3.
$Which of the following is a pure substance?$
A. $Milk$
B. $NaHCO_{3}$
C. $Crude oil$
D. $Air$
4.
$What happens to the potential energy of particles during a phase change from liquid to gas?$
A. $It increases.$
B. $It decreases.$
C. $It remains constant.$
D. $It becomes zero.$
5.
$The diagram represents a substance undergoing a phase transition from the gas state to the liquid state at a constant temperature. Which statement best describes the changes occurring at the particulate level during this process?$
A. $The average kinetic energy of the particles decreases as they slow down.$
B. $The particles move further apart and their potential energy increases.$
C. $The potential energy of the particles decreases as intermolecular forces become significant.$
D. $The covalent bonds between the atoms are broken to allow the transition to occur.$
6.
$A student uses the following flowchart to categorize various samples of matter. If a sample is a pure substance that can be broken down into simpler substances only by chemical decomposition, which category and example correctly match this description?$
A. $Category: Element; Example: Magnesium ribbon$
B. $Category: Compound; Example: Pure sodium chloride$
C. $Category: Mixture; Example: Saltwater solution$
D. $Category: Compound; Example: Brass alloy$
7.
$Which statement about the absolute temperature scale (Kelvin) is correct?$
A. $It can have negative values.$
B. $Its zero point is the freezing point of water.$
C. $It is directly proportional to the average kinetic energy of the particles.$
D. $The size of one Kelvin degree is different from the size of one Celsius degree.$
8.
$-100^\circ C$
A. $Solid$
B. $Liquid$
C. $Gas$
D. $A mixture of liquid and gas$
9.
$Which of the following describes the behavior of an ideal gas?$
A. $Particles have significant volume and attract each other.$
B. $Particles have negligible volume and no intermolecular forces.$
C. $Particles lose energy every time they collide with each other.$
D. $100^\circ C$
10.
$Why does the pressure of a gas increase when its volume is decreased at constant temperature?$
A. $The particles move faster and hit the walls harder.$
B. $The particles hit the walls of the container more frequently.$
C. $The particles grow in size due to the increased density.$
D. $The intermolecular forces between particles increase.$

Download the worksheet for Structure 1. Models of the particulate nature of matter - Introduction to the particulate nature of matter to practice offline. It includes additional chapter-level practice questions.

Electron configurations

Subtopic

Electron configurations under Structure 1. Models of the particulate nature of matter for Grade 12 IB.

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Preview questions (no answers)

1.
$3s$
A. $3s$
B. $3p$
C. $They are equal$
D. $Depends on the number of protons$
2.
$[Ar] 4s^{2} 3d^{2}$
A. $20$
B. $22$
C. $24$
D. $26$
3.
$Z = 8$
A. $0$
B. $1$
C. $2$
D. $4$
4.
$Which principal energy level contains only 's' and 'p' subshells in the first three periods?$
A. $n = 1$
B. $n = 2$
C. $n = 4$
D. $All of them$
5.
$3d$
A. $Z = 21$
B. $Z = 23$
C. $Z = 25$
D. $Z = 27$
6.
$What property of electrons is described as 'spin'?$
A. $An intrinsic angular momentum that can have two values.$
B. $The speed at which an electron orbits the nucleus.$
C. $The physical rotation of the electron on its axis.$
D. $The circular path an electron takes around the nucleus.$
7.
$Which electron configuration belongs to an element in Group 17 of the periodic table?$
A. $[Ne] 3s^2 3p^5$
B. $[Ne] 3s^2 3p^7$
C. $[Ne] 3s^2 3p^6$
D. $[Ar] 4s^2 3d^5$
8.
$An atom has 15 protons and 16 neutrons. What is its symbol and the number of valence electrons?$
A. $P$
B. $S$
C. $P$
D. $Ga$
9.
$Which of the following is a possible electron configuration for an excited state of a Neon atom?$
A. $1s^2 2s^2 2p^6$
B. $1s^2 2s^2 2p^5 3s^1$
C. $1s^2 2s^2 2p^5$
D. $1s^2 2s^2 2p^6 3s^1$
10.
$\lambda$
A. $E \propto \lambda$
B. $E \propto 1/\lambda$
C. $E = \lambda / h$
D. $E = h \lambda$

Download the worksheet for Structure 1. Models of the particulate nature of matter - Electron configurations to practice offline. It includes additional chapter-level practice questions.

Counting particles by mass: The mole

Subtopic

Counting particles by mass: The mole under Structure 1. Models of the particulate nature of matter for Grade 12 IB.

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Preview questions (no answers)

1.
$0.1$
A. $0.1 mol$
B. $0.2 mol$
C. $0.4 mol$
D. $4.0 mol$
2.
$12 \text{ g}$
A. $One gram$
B. $One mole$
C. $One molecule$
D. $One isotope$
3.
$3.01 \times 10^{23}$
A. $6.00 \text{ g}$
B. $12.01 \text{ g}$
C. $24.02 \text{ g}$
D. $3.00 \text{ g}$
4.
$0.5$
A. $10 \text{ g mol}^{-1}$
B. $20 \text{ g mol}^{-1}$
C. $40 \text{ g mol}^{-1}$
D. $80 \text{ g mol}^{-1}$
5.
$H_{2}O$
A. $2.7 g$
B. $4.5 g$
C. $9.0 g$
D. $13.5 g$
6.
$1.0$
A. $3.0 \times 10^{20}$
B. $6.0 \times 10^{20}$
C. $3.0 \times 10^{23}$
D. $1.5 \times 10^{20}$
7.
$11.35$
A. $3.01 \times 10^{23}$
B. $6.02 \times 10^{23}$
C. $1.20 \times 10^{24}$
D. $3.01 \times 10^{22}$
8.
$Which of the following has the highest percentage of nitrogen by mass?$
A. $NH_{3}$
B. $NH_{4}NO_{3}$
C. $N_{2}O$
D. $NO_{2}$
9.
$0.500\text{ g}$
A. $3.32 \times 10^{21}$
B. $5.51 \times 10^{21}$
C. $3.32 \times 10^{22}$
D. $4.74 \times 10^{21}$
10.
$0.1\text{ mol}$
A. $0.1$
B. $0.2$
C. $0.3$
D. $0.4$

Download the worksheet for Structure 1. Models of the particulate nature of matter - Counting particles by mass: The mole to practice offline. It includes additional chapter-level practice questions.

Ideal gases

Subtopic

Ideal gases under Structure 1. Models of the particulate nature of matter for Grade 12 IB.

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Preview questions (no answers)

1.
$11.35\ dm^3$
A. $113.5\ cm^3$
B. $11,350\ cm^3$
C. $1,135\ cm^3$
D. $0.01135\ cm^3$
2.
$R$
A. $8.31$
B. $0.0821$
C. $1.00$
D. $22.7$
3.
$If a gas is compressed at constant temperature, what happens to the average speed of the particles?$
A. $It increases.$
B. $It decreases.$
C. $It remains the same.$
D. $It depends on the mass of the gas.$
4.
$PV = nRT$
A. $Number of particles$
B. $Number of moles$
C. $Number of grams$
D. $Newtonian constant$
5.
$What happens to the volume of a gas if the pressure is tripled and the Kelvin temperature is tripled?$
A. $Volume triples$
B. $Volume is reduced to one-ninth$
C. $Volume remains unchanged$
D. $Volume is reduced to one-third$
6.
$0.100\,mol$
A. $2.27 dm^3$
B. $2.49 dm^3$
C. $0.249 dm^3$
D. $24.9 dm^3$
7.
$16\,g$
A. $O2$
B. $CH4$
C. $They exert the same partial pressure$
D. $It depends on the temperature$
8.
$1.0\text{ dm}^3$
A. $200 kPa$
B. $100 kPa$
C. $50 kPa$
D. $25 kPa$
9.
$CO_2$
A. $2.27$
B. $22.7$
C. $1.14$
D. $4.54$
10.
$Which of the following gases has the highest density at STP?$
A. $N_2$
B. $O_2$
C. $CO_2$
D. $Ar$

Download the worksheet for Structure 1. Models of the particulate nature of matter - Ideal gases to practice offline. It includes additional chapter-level practice questions.

Structure 1. Models of the particulate nature of matter

Introduction to the particulate nature of matter

❓Preview questions (no answers)

Electron configurations

❓Preview questions (no answers)

Counting particles by mass: The mole

❓Preview questions (no answers)

Ideal gases

❓Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)

Preview questions (no answers)