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PRESENTATION OUTLINE
Matter
- Anything that takes up space and has mass. All matter is made up of atoms
Photo by NASA's Marshall Space Flight Center
atom
- The smallest unit of a chemical element.
- Each atom consists of a nucleus, which has a positive charge, and a set of electrons that move around the nucleus.
Photo by TonZ
element
- Each element is made of only one kind of atom. There are about 120 elements Examples
- hydrogen (H2) oxygen (O2) carbon (C) nitrogen (N2) iron (Fe) aluminum (Al) gold (Au) calcium (Ca)
Photo by denn
PERIODIC TABLE
- a list of all of the chemical elements that exist in the universe (that have been discovered by humans so far) Categorizes, organizes elements according to the properties of their atoms
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MOLECULE
- Formed when 2 or more atoms join together. These may be 2 of the same atom or 2 different atoms.
- Examples of Molecules: water (H2O) salt (NaCl) oxygen (O2) sugar (C6H12O6) carbon dioxide (CO2)
Photo by p_a_h
COMPOUND
- Formed when 2 or more DIFFERENT atoms are joined together. Note: All compounds are also molecules, but not all molecules are compounds. Examples of Compounds: CO2 NaCl H2O2 Non Examples - Not compounds: O2 H2 Why aren’t these compounds?
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SUBSCRIPTS
- tell you how many “atoms” of each element for that molecule Example: H2 = 2 atoms hydrogen Examples: H2O = 2 atoms hydrogen, 1 atom oxygen
Photo by Victorrochajr
PHOTOSYNTHESIS
- is the process by which plants make their own food.
- 6H2O + 6CO2 → C6H12O6 + 6O2
- To make food plants need: carbon dioxide water sunlight
- Provides: Food (for the plant) Oxygen (for respiration)
