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18 Cards in this Set

  • Front
  • Back
What are materials made of?
All materials are made of atoms
What is the atomic radius?
The atomic radius is the size of the atom.
What is the nucleus?
The atoms nucleus contains protons and neutrons.
What does the nucleus contain?
Positivly charged protons and uncharged or nutural charged neutrons.
What are the nucleons?
Protons and neutrons together are called nucleons.
What is chemical bonding?
chemical bonding can be explained as the end product of the electrical forces of attraction and repulision between oppositely charged or similarly charged particles of matter
What are the two groups of bonds?
Primary bonds
Secondary bonds
What are primary bonds and what are they account for?
Primary bonds account for the strength and hardness of most structural materials
Name the primary bonds?
Metallic Bonds
Covalent Bonds
Ionic Bonds
How would you describe Metallic bonds?
They allow the atom to move their relative position which creates a type of electric field. They are the weekest of the primary bonds,and have good ductility and electrical conductivity because of the free movement of electrons in the metallic bond.
How would you describe covalent bonds?
Covalent bonds are formed between two atoms when the atoms share there valence electrons. In general organic materials are formed by covalent bonds, they are the strongest force of attraction.
How would you describe Ionic bonds?
Ionic bonds are when elements actually transfer electrons to other elements. In general inorganic materials form ionic bonds.
What are secondary bonds?
Secondary are weaker bonds and include:
Van de Waal Bonds
How would you describe Van der Waal bonds?
Van der Waal bonds join molecules or groups of atoms by weak electrostatic attractions, they can dramatically change the properties of materials such as polymers.
What is mixed bonding and give an example?
Mixed bonding is when compounds are bonded together by a combination of two of the other four types of bonds such as PVC
What are the three forms of matter in ?
What are the differences between gasses, Liquids and solids?
Gasses have on order or no repetitive crystalline patern at all,the atoms randomly fill up the space to which the gas is confined.
What are phases?
A state which different substances can go through such as water can be liquid, solid, gas