Elements and Compounds

A _____ _____ has a definite and unchanging composition.

Does the picture show a solid, liquid, or gas?

Is the picture a solid, liquid, or gas?

What did Dmitri Mendeleev do?

Mixtures can be easily __________.

H2O has one____ and two _____.

Matter can be solid, __________, or gas.

An_______________________ cannot be broken down into any other substance.

To count the number of elements in a molecule you count the number of _______________ letters.

A ______________ is a combination of many different elements not chemically combined

Fe is the _____________ for Iron.

The symbol for an element can be found on the ______________ ______________.

Does the picture show a sollid, liquid, or gas?

A ________________ is a pure substance formed when one or more elements have chemically combined to form a new substance. Ex. NaCl Salt

__________ is everything around you.

An ____________________ is a pure substance that cannot be broken down into any other substance. Ex. Gold Au

The smallest particle in a chemical element or compound is called a __________________.