In which of the following phases are particles of a substance generally closest together?

Question

In which of the following phases are particles of a substance generally closest together??  
A. Gas  
B. Liquid  
C. Plasma  
D. Solid

Accepted Answer

Correct Answer: (D)Solid. 
Rationale: Particles of a substance are generally closest together in the solid phase.The spatial arrangement and average distance between particles (atoms, molecules, or ions) are primary distinguishing features of the states of matter. This distance is governed by the balance between the particles' kinetic energy (which tends to separate them) and the intermolecular forces (which tend to pull them together).A) GasIn the gaseous state, particles possess very high kinetic energy. Intermolecular forces are negligible in comparison, allowing particles to move independently and randomly at high speeds. They are widely separated, with large empty spaces between them. Gases are highly compressible because the particles are already so far apart that they can be pushed closer together easily.B) LiquidIn the liquid state, particles have moderate kinetic energy. They are close enough for intermolecular forces to be significant, giving liquids a definite volume. However, particles have enough energy to slide past one another, allowing flow. The average intermolecular distance is greater than in solids but much smaller than in gases.C) PlasmaPlasma is often considered the fourth state of matter, occurring at extremely high temperatures where atoms are ionized, creating a soup of free electrons and positive ions. While the charged particles in a dense plasma (like in a star) can be packed together, in most laboratory or observable plasmas (like flames or neon signs), the particles are highly energetic and very far apart, similar to gases. The defining characteristic of plasma is ionization and collective behavior, not necessarily extreme proximity.D) SolidIn the solid state, particles have the lowest kinetic energy, typically limited to vibrational motion around fixed points in a lattice. Strong intermolecular forces hold the particles in a rigid, highly ordered, and closely packed arrangement. This results in the smallest possible average distance between neighboring particles for a given substance, making solids essentially incompressible and giving them a definite shape and volume.Conclusion:The progression from solid to liquid to gas involves increasing particle kinetic energy and decreasing influence of intermolecular forces, leading to greater particle separation. Therefore, particles are most densely packed and closest together in the solid phase.

In which of the following phases are particles of a substance generally closest together?

A
Gas

B
Liquid

C
Plasma

D
Solid

Particles of a substance are generally closest together in the solid phase.

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In which of the following phases are particles of a substance generally closest together?

A Gas B Liquid C Plasma D Solid

Particles of a substance are generally closest together in the solid phase.

Topic Flashcards

Mini Quiz

Related Questions

A
Gas

B
Liquid

C
Plasma

D
Solid