Atomic Shell
Ionic crystals
Covalent crystals
Atom
Atomic number (Z)
Ionic bond
Protons
Niels Bohr
Metalic bond
Ernest Rutherford
Chemical bond
Electrons
Atomic nucleus
Ions
Neutrons
Covalent bond
Periodic Table of Elements
Isotopes
Molecule properties
Molecule
J. J. Thomson
Metalic crystals
Jonh Dalton
Mass number (A)
The number of protons in the nucleus of an atom
Very high melting and boiling points, insoluble in water and not good electrical conductors
Liquids or gases at room temperature. Some can be solid, but they melt at low temperatures.
Heavy positively charged particles found within atomic nuclei.
Atoms of the same element that have different numbers of neutrons
A table that classifies elements by their physical and chemical properties; rows are called periods; columns are called groups;
A chemical bond formed when non-metal atoms share electrons
From low to high melting and boiling points, insoluble in water and very good electrical conductors
Negatively charged particles, with very small mass, found outside the nucleus
The sum of the number of neutrons and protons in an atomic nucleus
Two or more non-metal atoms held together by covalent bonds
An atom's dense central core, containing protons and neutrons.
A grouping of electrons surrounding the nucleus of an atom
The force that holds atoms together
Heavy uncharged particles found within atomic nuclei
An attraction between a positive metal ion and the electrons surrounding it
Charged atoms
The smallest unit of matter that constitutes a chemical element.
Formed when one or more electrons are transferred from one metal to non-metal atom
Very high melting and boiling points, soluble in water and good electrical conductors in solution or molten
