Lecture 2 Flashcards
Chemical bond
An attraction between two atoms resulting from a sharing of of outer shell electrons or presence of opposite charge on atoms
Chemical reaction
The making and breaking of chemical bonds leading to changes in composition matter.
Compound
A substance consisting of two or more different elements combined in fixed ratio
Covalent bond
A type of strong chemical bond in which two atoms share one or more parts of valence electrons.
Electron shell
An energy level of electrons at characteristic average distance from the nucleus of an atom.
Electron
A subatomic particle with a single negative electrical charge and mass. One or more electrons move around the nucleus of an atom.
Element
Any substance that can’t be broken down by chemical reactions.
Hydrogen bond
Weak chemical bond that’s formed when the positive hydrogen atom of a polar covalent bond is one molecule is attracted to the negative atom of a polar covalent bond in another molecule.
Ion
An atom that has gained or lost one or more electrons thus Acquiring a charge.
Ionic bond
A chemical bond resulting from the attraction between oppositely charge ions.
Isotope
One of several forms of an element, each with same number of protons but different number of neutrons
Molecular formula
A type of molecular notation representing the quantity of constituent atoms
Molecule
The two or more atoms held together by covalent bonds
Neutron
Subatomic particle with no charge.
Product
A material resulting from a chemical reaction
