Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
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 ?
|
Liquid
Gas Solid |
|
|
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
|
