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Atom/Periodic Table

Atom and Periodic Table Vocabulary

A _______________ is positive particle located in the nucleus proton
A majority of the atom's mass is in the ____________. nucleus
________ and _________ add together to make the atomic mass. Protons and neutrons
__________ are the negative particles in the orbitals. Electrons
______________________ are the neutral particles in the nuclues Neutrons
__________ ________ are the outer electrons involved in bonding. Valence electrons
A _____________ is a column on the periodic table. group
A _______________ is a row on the periodic table. period
Groups numbers determine the number of ______________ valence electrons
A period number tells you the number of ___________. orbitals.
The bold line divides the chart into __________, __________, and _____. metals, nonmetals and metalloids
Group _________ is the most reactive because it has ____ valence electron. 1; 1
Group ____________ is the most stable because it has _____ valence electrons 18; 8
Created by: lschramme