What is an Atom

What is the fundamental nature of atoms in chemistry?

• Large, visible particles that form mixtures.

• Indivisible units that make up all matter.

• Complex compounds formed by chemical reactions.

• Substances that can be broken down indefinitely.

Which ancient Greek philosopher is credited with first proposing the idea of "atomos" as uncuttable particles?

• Aristotle

• Plato

• Democritus

• Socrates

Why was Democritus's concept of atoms not widely accepted in his time?

• It contradicted religious beliefs.

• He lacked experimental evidence to support his claim.

• His ideas were too complex for the time.

• Other philosophers had more popular theories.

In chemistry, what defines an "element"?

• A substance that can be easily created by mixing other chemicals.

• A complex mixture of various pure substances.

• A primary constituent of matter that cannot be created or broken down through normal chemical reactions.

• Any substance that is liquid at room temperature.

What is formed when different elements react with each other under suitable conditions?

• New elements with altered properties.

• Compounds with new properties.

• Mixtures that retain original properties.

• Indestructible atoms.