Atoms 919 OBJECTIVES 1 Define and distinguish atom

Atoms! 9/19 OBJECTIVES: 1. Define and distinguish atom, element, molecule compound, and matter. TASK: 1. What is an atom? Please write your answer in a complete sentence or two. (on notes)

Atoms are small • An atom is the smallest piece of matter that is stable under normal conditions. • All matter is made up of atoms

(almost) Everything is made of atoms! Sugar

Even You and Every Other Living Thing are Made up of Atoms. • Matter: anything that has mass and takes up space. • Keratin is a protein that is made of matter. • Everything except energy is made up of matter

How small? 1 human is made up of about 100, 000, 000 cells! …and 1 cell is made up of about 100, 000, 000 atoms

Atoms are Ridiculously Small A MILLION atoms in a straight line would be as thick as a single human hair!!! The radius of a carbon atom is only 0. 22 nm

Good thing Science has Powerful Microscopes! • Each bright spot is a single atom

Elements: substances made up of only 1 type of atoms • An element is a substance made up of only 1 type of atom. Only silver atoms in here!

Different Elements = Different Atoms • Atoms of different elements are different from one another because they have different numbers of protons, neutrons, and electrons.

Compounds • Compounds are pure substances made of more than one type of atom, joined together Water is a compound made of oxygen and hydrogen atoms.

Molecules • A molecule is the smallest piece of a compound. Wally the Water Molecule says: “If I get broken down any farther, I won’t be water anymore… I’d just be a mixture of hydrogen and oxygen!” Wally

In summary… Summary Example Atom the most basic unit of normal matter. Hydrogen Atom Element made of just one type of atom. Silver Compound made of molecules Water Molecule particle made of more Water molecule than one type of atom, bonded together in a specific way • An atom is the smallest piece of an element, and a molecule is the smallest piece of a compound.