Warm-Up. How long can you go without water?. Questions?. What is an atom? What is inside an atom?. Understanding Molecules and Atoms. http:// www.youtube.com/watch?v=cV4jJZCIMPo http://www.youtube.com/watch?v=AfXxZwNLvPA. Chemistry of Life. Chapter 6. By PresenterMedia.com. Element.
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How long can you go without water?
What is an atom?
What is inside an atom?
Made up of Atoms
Cannot be broken down into simpler substances
Smallest particle of an element
Nucleus: Center of the atom
Made up of chemically combined elements
Can be broken down into its elements
Water is an example, made up of two hydrogen atoms and one oxygen atom
Are in Glucose?
Formed when two atoms share electrons
HINT: Covalent = Co Captain shares duties
or Co-Pilot shares duties
Attractive force between two ions of opposite charges
Ions are negatively and positively charged
Weak chemical bonds involving Hydrogen
Molecule with unequal distribution of charge
Net movement of particles from an area of high concentration to low concentration
High to Low
Continuous movement but no overall change in concentration
HINT: Think of a treadmill
All of the chemical reactions that take place within an organism.
Measures how acidic or basic
Acid: forms hydrogen ions in water H+
Base: forms hydroxide ions OH- in water
What do you call a substance made of 2 or more elements?