Periodic Table Crossword

Dense, positively charged mass located in the center of the atom.
A positively charged subatomic particle that is found in the nucleus.
Negatively charged subatomic particle found outside the nucleus.
Electrons in the atom with the lowest energy.
Arrangement of the electrons.
Neutral subatomic particle found in the nucleus.
Equals the number of protons in an atom.
Sum of the protons and neutrons in the nucleus.
Possible energies in an electron.
Atoms of the same element that have different numbers of neutrons and different mass numbers.
Location and motion of electron.
Region of space around the nucleus.
Elements in group 8a.
Elements in group 7a.
Elements in group 2a.
an arrangement of elements in columns, based on a set of properties that repeat from row to row.
Each row in the table of elements in figure 6.
Each column on the periodic table is called________.
Elements that are good conductors of electric current and heat.
Elements that form a bridge between elements.
Elements that are poor conductor of heat and electric current.
Elements with properties that fall between metals and non-metals.
Electron that is in the highest occupied energy level of an atom.
The elements in group 1a.