Atoms! Objectives: Define atom, molecule, element, compound, and matter. Identify the parts of an atom. Task: What is an atom? Please write your answer.

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Presentation transcript:

Atoms! Objectives: Define atom, molecule, element, compound, and matter. Identify the parts of an atom. Task: What is an atom? Please write your answer in a complete sentence or two on your handout.

(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

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

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

Atoms are Ridiculously Small A MILLION atoms in a straight line would be as thick as a single human hair!!!

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

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

Water is a compound made of oxygen and hydrogen atoms. 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

Check Your Knowledge We have defined the following VERY IMPORTANT terms: Atom Element Compound Molecule What’s the difference between an atom and a molecule? What do elements and compounds have in common? What’s different?

Parts of an atom: Label the diagram Atoms contain 2 parts: The atomic nucleus contains protons and neutrons Electrons fly around the nucleus near the speed of light

What Atoms are made of Atoms are made of 3 parts. Protons are found in the atomic nucleus. They have a positive electrical charge. Neutrons are also found in the atomic nucleus. They have no charge. Electrons are found outside of the nucleus. They have a negative charge.

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

Homework: “Matter,” “Elements,” “Atoms” pp. 31-32. Cornell Notes