Atoms & Elements
This is a pure substance that cannot be changed into simpler substances through chemical or physical means.
What is an element?
A positively charged particle that makes up the nucleus of an atom.
What is a proton?
Bond that occurs in metals, in which atoms share freely moving valence electrons with all its neighboring atoms
What is a metallic bond?
Type of molecule model that uses colored spheres to represent atoms and the lines attached to each sphere represent bonds.
What is the Ball and Stick Model?
The number of protons in an atom.
What is the atomic number?
This is the basic unit of a chemical element.
What is an atom?
This is the negatively-charged subatomic particle that is located outside of the nucleus.
What is an electron?
Type of intermolecular bond in which valence electrons are shared between two different nonmetal atoms.
What is a covalent bond?
An original model on which something is patterned.
Prototype
Element found in column 1 of the periodic table; they are soft, shiny metals with low melting points.
What is an alkali metal?
The sum of the protons and neutrons that make up the nucleus of an atom
What is the mass number?
A particle that has no charge that makes up the nucleus of an atom.
What is a neutron?
Type of intermolecular bond between a metal and a nonmetal that is based on the attractive forces between charged ions
What is an ionic bond?
Type of molecule model that represents atoms as partial spheres with diameters proportional to that of the real atom and are adjoined directly to each other.
An element found in column 2 of the periodic table; they are silvery white, shiny metals with melting points higher than those of the alkali metals.
What is an alkaline earth metal?
Area of the atom outside of the nucleus.
What is the electron cloud?
In atoms, the condition in which a nucleus is unlikely to undergo decay.
What is stable?
Molecule in which the electrons, and therefore the charges, are not distributed evenly.
What is a polar molecule?
Type of molecule model that represents individual atoms with their periodic symbol and bonds with two dimensional lines between atoms.
Structural Formula Model
A collection of elements forming a single column on the periodic table.
What is a group?
Tendency for atoms to want 8 valence electrons.
What is the octet rule?
A charged particle that results when the number of protons and number of electrons differ.
What is an ion?
The type of bond that forms between two different polar molecules
What is a hydrogen bond?
DAILY DOUBLE: electron in the outermost shell of an atom.
What is a valence electron?
A collection of elements forming a single row on the periodic table.
What is a period?