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