atoms and the perodic table Tommy Flashcards
Proton
The positive charge in the nucleus
Nucleus
Atoms middle part made up of Protons and Nuetrons
Neutron
The part in a nucleus with no charge
Electron
A particle with a negative charge
Orbital
A part In the atom where it has a high probability of finding electrons
Valence electron
Determines the atoms physical properties and is found on the very outer shell
Periodic law
Repeating chemical and physical properties change with the atomic number of elements
Period
The horizontal row of elements in the periodic table
Group
The vertical row of elements in the periodic table
Metal
Most of what’s on the periodic table
Non metal
The elements that ain’t metal
Semiconductor
Acts as a metal and non metal
Alkali metals
The first group in the periodic table
Alkaline-earth metal
2nd group in the periodic table
Transition metal
Groups 3-12 on the periodic table
Halogen
Group 17 on the periodic table
Nobel gas
Group 18 on the periodic table
Ion
Atom(s) that lost or gained an electron
Atomic number
Number of protons in the nucleus of an atom
Mass number
The sum of the numbers of protons and neutrons in the nucleus of an atom
Atomic mass unit (amu)
A unit of mass that describes the mass of an atom
Average atomic mass
The weighted average of the masses of all naturally occurring isotopes of an element
