Flashcardizz: Elements and Compounds

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Examples include hydrogen (H), oxygen (O), and gold (Au).

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together. Examples include water (H2O) and sodium chloride (NaCl).

Front

What is the chemical formula for water?

Back

H2O

Front

What is the chemical formula for table salt?

Back

NaCl

Front

Which of the following is an example of an element: H2O, H2, NaCl, CaCO3?

Back

H2

Front

What distinguishes a compound from a mixture?

Back

A compound has a fixed composition and properties, while a mixture consists of two or more substances that retain their individual properties and can vary in composition.

Front

What is the smallest unit of an element?

Back

An atom.

Front

What is the smallest unit of a compound?

Back

A molecule.

Front

Can elements be broken down into simpler substances?

Back

No, elements cannot be broken down into simpler substances by chemical means.

Front

What is a chemical bond?

Back

A chemical bond is the force that holds atoms together in a compound. Types of bonds include ionic and covalent bonds.