Atoms,Elements,Molecules, and compounds

Front

What is an atom?

Back

The smallest unit of an element that retains the properties of that element.

Front

What is an element?

Back

A pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is a molecule?

Back

A group of two or more atoms bonded together.

Front

What is a compound?

Back

A substance formed when two or more different elements are chemically bonded together.

Front

Is water (H2O) a compound?

Back

Yes, it is a compound made of hydrogen and oxygen.

Front

What is the difference between a mixture and a compound?

Back

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

Front

What is gold?

Back

An element, represented by the symbol Au.

Front

What is krypton?

Back

An element, represented by the symbol Kr.

Front

Are all molecules compounds?

Back

No, not all molecules are compounds; some are made of the same type of atoms.

Front

What is the chemical formula for table salt?

Back

NaCl, which is a compound made of sodium and chlorine.