periodic table crossword

family group of elements with similar chemical properties
most reactive of all metals
salt-former and compounds
the creator of the periodic table
chemical elements measure of the size of its atoms
organizational system for elements
characteristic that can be observed
characteristics of a substance
central idea of the atom composed of protons and neutrons
arranged in shells surrounding the nucleus
determines the element identity
large with no charge
central and most important part of an object, movement, or group,
made up of two more elements
composed of identical atoms
a solid material that is typically hard, shiny, malleable, fusible, and ductile,
an element or substance that is not a metal.
properties are intermediate between those of metals and solid nonmetals.
father of atomic theory
stream of charged particles had electrons in them
electrons are when they go around the nucleus of an atom.
gold foil experiment, to discover the existence of an atomic nucleus protons
electrons are arranged in circles around the nucleus
number of protons in the nucleus of an atom,
the total number of protons and neutrons in a nucleus.
two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei
mass of an atom of a chemical element expressed in atomic mass units
measure of the tendency of an atom to attract a bonding pair of electrons.
an atom or a molecule acquires a negative or positive charge
gaseous elements helium, neon, argon, krypton, xenon,
the basic unit of a chemical element.