click below
click below
Normal Size Small Size show me how
KOTELCHEMMODULE5
KOTEL CHEMISTRY MODULE 5 VOCABULARY
Question | Answer |
---|---|
states that when the elements are arranged by increasing atomic number, there is a periodic repetition of their properties | periodic law |
arrangement of elements in order of increasing atomic number such that elements with similar properties are in the same group or column | periodic table |
vertical columns of elements on the periodic table | groups |
horizontal rows of elements on the periodic table | periods |
elements of the s (groups 1 and 2) and p (groups 13-18) blocks on the periodic table | main group (representative) elements |
elements in groups 3-12 on the periodic table that have characteristic metallic properties | transition elements |
f block elements that fit into the 7th period on the periodic table | actinides |
f block elements that fit into the 6th period on the periodic table | lanthanides |
elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity | nonmetals |
a highly reactive group 17 element | halogens |
an extremely unreactive group 18 element | noble gases |
an element that has physical and chemical properties of both metals and nonmetals | metalloids |
half the distance between the nuclei of two identical atoms that are bonded together; used to indicate the sizes of atoms | atomic radius |
atom or group of bonded atoms that has a positive or negative charge | ion |
an ion that has a positive charge | cation |
an ion that has a negative charge | anion |
distance from the nucleus of an ion to the outermost portion of its electron cloud | ionic radius |
energy required to remove an electron from a gaseous atom | ionization energy |
indicates the relative ability of an atom to attract electrons in a chemical bond | electronegativity |