Structure 1. Models of the particulate nature of matter

Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.

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 11 IB.

About Topic & Revision

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 11 IB.

About Topic & Revision

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 11 IB.

About Topic & Revision

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 11 IB.

About Topic & Revision

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)