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Intro to Water. Understanding and Comprehending why water has unique and special properties. What is an atom?. Atoms- are the smallest building blocks of matter All matter is composed of atoms When two or more atoms join its called a molecule. Understanding Parts of the Atom.

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intro to water

Intro to Water

Understanding and Comprehending why water has unique and special properties

what is an atom
What is an atom?
  • Atoms- are the smallest building blocks of matter
  • All matter is composed of atoms
  • When two or more atoms join its called a molecule
understanding parts of the atom
Understanding Parts of the Atom
  • To understand why atoms join you have to understand the parts of the atom
  • Nucleus- center of atom that has protons and Neutrons in it
  • Neutrons- have no charge, found in Nucleus
  • Protons- have positive electric charge found in Nucleus
  • Electron- small negatively charged particles that have almost no mass, “orbit” around nucleus
why do different atoms combine
Why do different atoms combine?
  • Atoms join because they are unstable
  • All atoms wish to be stable
  • To achieve this they need to obtain a full outer shell of electrons
  • This happens when atoms share, lose or gain electrons
  • Full outer shell usually contains 8 electrons: called Octet Rule
construction of water
Construction of Water
  • Water is made up of two elements; Hydrogen and Oxygen
  • Neither has a full outer shell of electrons so they join
  • However electrons are not shared equally and this gives water unique traits
water a polar molecule
Water a Polar Molecule
  • Because electrons are not shared evenly, water has a slightly electrical charge
  • You call this type of molecule a Polar molecule- a molecule that has slight electrical charges
  • This gives water 4 unique traits
4 unique properties of water
4 Unique Properties of Water
  • 1. Universal Solvent- it can dissolve most anything placed in it
  • 2. Expands when Frozen- Water can only freeze in a specific way; as a result it expands when frozen causing it to become less dense
  • 3. Capillary Action- water can actually “defy” gravity and pull itself upwards (Water ADHESION)
  • 4. Surface Tension- water molecules “sticking” together creating the force of COHESION between them
other unique traits
Other Unique Traits
  • High Specific Heat -water is 23 times “better” at retaining heat then air: it is also the only known substance to be found in all 3 states of matter on Earth
  • HEAVY- 33ft of water depth = the same weight as 17 miles of air (ground uppermost atmosphere)