Periodic Table (The Periodic Table)

Alkali metals.

Alkaline earth metals

transition metals

Found along the 'staircase'. Have properties of both metals and nonmetals

brittle , dull, poor conductors of heat and electricity

Positively charged particle in the nucleus of an atom

A neutral subatomic particle that is neutral and that is found in the nucleus of an atom

A tiny, negatively charged particle that moves around the nucleus of an atom.

The number of protons in the nucleus of an atom of an element

The total number of protons and neutrons in an atom's nucleus

A chart of all chemical elements currently known, organized by atomic number.

pure substance that consists entirely of one type of atom

the smallest unit of an element that maintains the properties of that element

horizontal rows on the periodic table

vertical columns on the periodic table

Good conductor of heat and electricity. Has luster and high density.

reflecting light;metallic luster, shiny

physical property of metals; able to be hammered into thin sheets

the ability of an object to transfer heat or electricity to another object

the ease and speed with which an element combines or reacts with other elements and compounds

very reactive, not found alone in nature, potassium and sodium are examples, Group 1 elements

hard, grey-white, good conductors of electricity, calcium and magnesium are examples, Group 2 elements

most are hard and shiny, less reactive, examples are iron, copper, nickel and gold

not found naturally on earth, all elements higher than 92

Positively charged, dense center of an atom that contains protons and neutrons

Organic compound composed of only carbon and hydrogen

The average mass of the isotopes of an element, including their percent abundance.

Type of bond in which atoms share electrons

Electrons on the outermost energy level of an atom

can be made into a wire

Process of atoms joining to form molecules or formula units. Electrons are transferred or shared in this process.

a type of liquid that is flammable and floats on water

An atom with the same number of protons but a different number of neutrons

The energy needed to remove the outermost electron from a gaseous atom.

smallest part of a substance that cannot be divided by chemical means.

The measure of matter in a substance. Units grams, kilograms

Brittle, poor conductors, no luster; can be a solid (s), liquid (l) or gas.(g)

Type of bonding where an atom gains or loses electrons to form an ion.(+/-)

type of bonding where electrons are shared around positive metal ions in a "sea of electrons"

The radius of an atom

The radius of an atom. Cations are smaller, anions are larger than their atom

A positively charged ion, formed by a lost of electrons

A negativity charged ion, formed by a gain of electrons

A compound containing cations and anions.

A 3-dimensional geometric arrangement of the atoms or molecules or ions composing a crystal

Two or more nonmetallic atoms joined together by covalent bonds.

Formed when one or more electrons are transferred from one atom to another

A covalent bond is formed when electrons are shared between atoms and can be polar or non-polar.

A group of reactive nonmetals. Group 17

Unreactive nonmetals. Atoms of this group have a full set of electrons in their outer level.

States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons

A substance that dissolves in water to give a solution that conducts electric current

the temperature at which a substance changes from a solid to a liquid

the temperature at which a substance changes from a liquid to a gas

the process by which one or more substances change to produce one or more different substances

a change of matter from one form to another without a change in chemical properties

Unreactive, like noble gases

solids in which the units that make up the three-dimensional network are joined by covalent bonds