Chapter 2 Flashcards
Atomic bonds are a result of ______ ______.
Electromagnetic force (EM)
The electronic force causes
______ charges to attract _____ charges and vice versa.
positive, negative
________ bonds are the strong bonds between atoms that involve the transfer or sharing of electrons between atoms.
Primary
Electrons in the outer shell of atoms are involved in chemical reactions and atomic bonding, these are termed _____ electrons.
valance
________ bonds are the result of an electron being given up by one atom and being accepted by another.
Ionic
________ bonds between two atoms are the result of two atoms sharing a pair of electrons.
Covalent
________ bonds are similar to covalent bonds in that valence electrons are shared between atoms. The difference is that the electrons in a metal object are not shared by two atoms; instead they are shared by all the atoms that make up that object.
Metallic
_________ bonds or ___ ___ ____ forces are the result of partial charges from an uneven distribution of electrons around an atom or molecule.
secondary bonds, van der Waals forces
A permanent partial charge or a ______ _____ occurs when one molecule with such partial charges encounters another. the negative attracts positive and vice versa.
permanent dipole
________ ________ result in a weak bonds, but they have a significant effect on the behavior of many materials.
Permanent dipole
________ bonds are a special case of a permanent dipole. The hydrogen atom contains only one electron.
Hydrogen
Materials can be classified into 3 categories based on their primary atomic bonds: _____ a fourth category is _____.
metals, ceramics and polymers.
Composites
_______ are held together by metallic bonds.
Metals
The atoms of a _______ material are bonded with ____ bonds. Table salt is a good example.
ceramic, ionic
_______ are composed of long chains of covalently bonded, repairing units.
Polymers
