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Chemistry

Reporting Category 1

TermDefinition
atom smallest unit of an element
protons positively charged particles
electrons negatively charged particles
neutrons neutral particles
atomic number equals the number of protons and electrons
atomic mass equals the number of protons and neutrons in the nucleus
nucleus the center of the atom that contains the protons and the neutrons
valence electrons the number of electrons in the outermost shell
two the number of electrons that the innermost energy level can hold
subscript the small number written after the chemical symbol that states how many atoms of that element are present
coefficient 4CO2 The number four is a _______?
8 4CO2 The total number of oxygen atoms
12 4CO2 The total number of atoms present
groups the columns on the periodic table
periods the rows on the periodic table
reactivity electrons determine an elements ______.
noble gases elements in group 18 that have a full outer shell
metals shiny, good conductors of heat and electricity
non-metals dull and are not good conductors of heat and electricity
metalloids along the stairstep on the periodic table, share characteristics of both metals and nonmetals.
neutral the overall charge of an atom
Created by: bwymore