E.C. Science Crossword Puzzle

The rows in the periodic table.
The columns in the period table.
Elements that are good conductors of electric current and heat.
Elements that are poor conductors of heat and electric current.
Elements with properties that fall between those of metals and nonmetals.
Electron that is in the highest occupied energy level of an atom.
An ion with a negative charge.
An atom that has a positive net or negative electric charge.
The force that holds the ions or atoms together as a unit.
The force that holds cations and anions together.
Solids whose particles are arranged in a lattice structure.
A chemical reaction that releases energy to its surroundings.
A chemical reaction that absorbs energy from its surroundings.
The rate at which reactants change into products over time.
A substance that affects the reaction rate without being used up in the reaction.
The substance that undergo change in a chemical reaction.
The new substances formed as a result of that change.
He organized elements into rows according to their atomic mass and into columns based on chemical and physical properties.
Most abundant metal in Earth's crust.
Most abundant element in the Earth's crust.