Flashcards in Lecture 2 Deck (20):
The smallest unit of matter
An attraction between two atoms, resulting from a sharing of outer shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells.
The making and breaking of chemical bonds, leading to changes in the composition of matter
A substance consisting of 2 or more *different* elements.
A type of strong (the strongest) chemical bond in which 2 atoms share one or more pairs of valence electrons.
An energy level of electrons at a characteristic average distance from the nucleus of an atom
Note: The first shell has 1 orbital. The rest have 2.
Sub-atomic particle with a single neg. charge.
Any substance that can't be broken down to any other substance by chemical reactions.
The weakest chemical bond. Happens when polar covalent bonds are attracted to each other.
Atom/atoms that have gained or lost an electron resulting in a pos./neg. charge.
Middle strength chemical bond. Results from attraction of oppositely charged ions.
One of several atomic forms of an element. Same number of protons but different neutrons, thus differeing in atomic mass
The recipe of a molecule
Two or more atoms held together by covalent bonds.
Sub-atomic particle with no electrical charge. Found in nucleus of atom.
A material resulting from a chemical reaction
Sub-atomic particle with a single pos. charge. Found in the nucleus.
A starting material in a chemical reaction
A diagram of an atom/molecule showing the distribution of electrons.