____ are the fundamental building blocks of Chemistry. ____ is made up of a bunch of different types of atoms. For example, a sugar crystal is made up of carbon atoms, oxygen atoms, and hydrogen atoms. There are ____ kinds of atoms which can be found on the ____ Atoms make up ____. A single matter is so ____ it is impossible to see (a human hair is about 500,000 times wider than an atoms). ____ was the first person ever in Ancient Greece to think there was something called atoms. ____ are the primary ingredients of matter that ____ be created or broken down through normal chemical reactions. ____ have discovered there are 118 pure elements which are what is on the periodic table. ____ can be combined through ____ and pressure to form ____. When Oxygen and Iron are combined it makes ____, a compound. When Hydrogen and Oxygen are combined they create ____, another example of a compound. When Oxygen and Mercury are combined, they form a toxic orange powder called ____. These compounds can be ____ and separated back into their elements ____. In 1905, ____ came up with an ____ to prove the existence of atoms and also to determine how big they were. ____ used Einstein's experiments to ____ with out a doubt atoms existed. Finally, in the 1970s the ____ was created to take pictures of atoms.

Introduction to Chemistry

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