UNIT 3: Periodicity

A list of all known elements arranged in order of increasing atomic number.

A row of elements in the periodic table.

Elements aligned vertically in columns in the periodic table.

Electrons in the outer shell of an atom.

Elements with only s electrons in the outer shell.

Elements with at least 1 p-electron in the outer shell.

Elements with at least 1 d-electron and at least 1 s-electron but no f or p electrons in the outer shell.

Elements with at least 1 f-electron and at least 1 s-electron but no d or p electrons in the outer shell.

The size of an atom, the distance between the nucleus and the outermost electron shell.

The size of an ion, the distance between the nucleus and the outermost electron shell of an ion.

The amount of energy required to remove 1 mole of electrons from 1 mole of atoms to form 1 mole of gaseous ions.

The amount of energy released when 1 mole of electrons is gained by 1 mole of atoms to form 1 mole of gaseous ions.

The ability of an atom to attract an electron pair in a covalent bond.

Negative ions formed when atoms gain electrons.

A scale used to measure the value of electronegativity for each atom.

A binary compound that contains oxygen and another element.

Having the ability to react chemically as either an acid or a base.

Group 1 metals that form alkaline solutions with high pH when they react with water.

Group 17 non-metals that are poisonous and form halide ions by gaining one more electron to complete the octet rule.

The measure of how much mass is contained in a given volume of a substance.

The temperature at which a substance changes from a solid to a liquid (melting point) or from a liquid to a gas (boiling point).

The tendency of a substance to undergo chemical reactions.

The arrangement of electrons in an atom or ion.

The electrons in the outermost energy level of an atom.

The energy change that occurs when an electron is added to a neutral atom to form a negative ion.

The distance from the center of an atom to the outermost electron shell.

The effect of inner electrons blocking the attraction between the nucleus and outer electrons.

The forces of attraction or repulsion between charged particles.

When a more reactive halogen displaces a less reactive halogen from a solution of its halide.

Chemical reactions where one element replaces another element in a compound.

A compound consisting of potassium and bromine ions.

A chemical element with the symbol Cl and atomic number 17.

A chemical element with the symbol Br and atomic number 35.

A compound consisting of sodium and iodine ions.

A chemical element with the symbol I and atomic number 53.