Flashcards in Unit 1- Bonding Deck (25)
what happens to potential energy when two things that are attracted and apart come together?
potential energy lowers
energy is released
what happens when things that are repelling and together move apart?
the potential energy lowers
energy is released
why is energy released by a system when bonds form?
kinetic energy is released because the electron transfer from the bond releases energy
what is ionic bonding?
show Lewis diagram
the attraction between metals and non metals
electrons are transferred from metals to non metals
what is covalent bonding?
a force of attraction between non metals and non metals
they share electrons
explain VSEPR theory.
Valence Shell Electron Pair Repulsion Theory
Pairs in the shell of the outermost shell of the central atom of a molecule REPEL each other
the repulsion determines the shape of the molecule
name the shapes of the molecules
what are the angles of the molecular shapes?
know how to draw the L3D's
what is a pure covalent bond?
the electron pairs are shared equally between the two atoms
what is a polar covalent bond?
the shared pair of electrons are closer to one atom than the other because of the difference in DEN values
know how to draw L3D's for pure and polar covalent bonds
what is potential energy?
stored energy between two things that are attracted or repelling
due to forces acting on an object
The outermost shell containing electrons
the electrons in the outermost shell
the number of electrons an element is capable of losing sharing or gaining
aka the charge on an atom when it forms a stable ion
two or more atoms held together by chemical bonds
molecules have a neutral charge
what do metals become when bonded?
what do non metals become when bonded?
draw an ionic bond (Bohr and Lewis)
draw a covalent bond (Bohr and Lewis)
one side of the molecule is slightly negative and the other is slightly positive
the larger difference in electronegativity the greater the dipole
The difference of electronegativity values
What does the DEN have to be to be considered ionic?
greater than 1.7