Lesson 1.1 Flashcard

Front

What is the difference between the arrangement of atoms in a solid and a gas?

Back

In a solid, atoms are closely packed together, while in a gas, atoms are farther apart.

Front

Define an element in terms of atomic composition.

Back

An element is a substance that consists of only one type of atom.

Front

What characterizes a homogeneous mixture?

Back

A homogeneous mixture is evenly mixed and composed of two or more pure substances.

Front

What distinguishes a diatomic element from a monatomic element?

Back

A diatomic element consists of two atoms of the same element, while a monatomic element consists of single atoms.

Front

How can you identify a heterogeneous mixture?

Back

A heterogeneous mixture contains visibly different substances or phases.

Front

What is the definition of a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.

Front

What is the significance of atomic models in chemistry?

Back

Atomic models help visualize and understand the structure and behavior of atoms and molecules.

Front

What is the difference between a compound and a mixture?

Back

A compound is a substance formed when two or more elements chemically bond, while a mixture is a combination of two or more substances that retain their individual properties.

Front

What are the characteristics of a gas?

Back

Gases have no fixed shape or volume, and they expand to fill their container.

Front

What is the role of temperature in the state of matter?

Back

Temperature affects the energy of particles, influencing whether a substance is in a solid, liquid, or gas state.