Chpt. 5

Question 1

Discovered that the periodic law should be based on atomic number rather that atomic mass

Answer 1

Henry Moseley

Question 2

Elements of Group 2 of the Periodic Table

Answer 2

alkaline earth metals

Question 3

American chemist who proposed pulling the lanthanides and actinides out of the main body of the Periodic Table

Answer 3

Glen Seaborg

Question 4

Elements that have some characteristics of metals and some characteristics of nonmetals

Answer 4

metalloids

Question 5

measure of the ability of an atom in a chemical compound to attract electrons

Answer 5

electronegativity

Question 6

elements whose nuclei undergo spontaneous disintegration into slightly lighter and more stave nuclei accompanied by the emission of particles or electromagnetic radiation

Answer 6

radioactive

Question 7

fourteen elements with atomic number form 90 (thorium) through 103 (lawrencium)

Answer 7

actinides

Question 8

atom or group of bonded atoms that has a positive or negative charge

Answer 8

ion

Question 9

electrons in the outermost energy level that are available to be gained, lost, or shared with other atoms

Answer 9

valence electrons

Question 10

substance made from the atoms of two or more elements chemically combined

Answer 10

compound

Question 11

d-block elements which are metals with typical metallic properties

Answer 11

transition elements

Question 12

energy required to remove one electron from a neutral atom of an element

Answer 12

iodization energy

Question 13

Italian chemist who came up with a good method of measuring relative atomic masses

Answer 13

Cannizzaro

Question 14

material that does not transfer heat and/or electricity readily

Answer 14

insulator

Question 15

physical and chemical properties of elements are periodic functions of their atomic numbers

Answer 15

periodic law

Question 16

English physicist who discovered argon

Answer 16

Lord Rayleigh

Question 17

electron configuration with 2s and 6p electrons as the outermost electrons; stable electron arrangement

Answer 17

octet

Question 18

elements of groups 1 and 2 of the Periodic Table

Answer 18

s-block

Question 19

active nonmetals of group 17 of the Periodic Table

Answer 19

halogens

Question 20

arrangement of the elements in order fo their atomic numbers so that elements whith similar properties fall in the same column or group

Answer 20

Periodic Table

Question 21

Energy change that occurs when and electron is acquired by a neutral atom

Answer 21

electron affinity

Question 22

elements of Groups 13-18 except for helium

Answer 22

p-block

Question 23

refers to any repeating pattern

Answer 23

periodic

Question 24

any process that results in the formation of a charged particle

Answer 24

ionization

Question 25

elements that are conductors of heat and electricity

Answer 25

nonmetal

Question 26

mass of an atom as based on the standard carbon-12 set at 12 units

Answer 26

relative atomic mass

Question 27

elements in the s-block or p-block of the Periodic Table

Answer 27

main group elements

Question 28

one half the distance between the nuclei of identical atoms that are bonded together

Answer 28

atomic radius

Question 29

electron-containing main energy level with the highest principle quantum number

Answer 29

highest occupied energy level

Question 30

number of protons in the nucleus of any atom

Answer 30

atomic number

Question 31

American chemist who developed and electronegativity scale

Answer 31

Linus Pauling

Question 32

Element with luster that is a good conductor of heat and electricity

Answer 32

metal

Question 33

arrangement of electrons in an atom

Answer 33

electron configuration

Question 34

proposed the idea that an atom has a small, dense central nucleus

Answer 34

Ernest Rutherford

Question 35

Russian chemist who first published a periodic table

Answer 35

Dmitri Mendeleev

Question 36

negative particular found outside the nucleus of an atom

Answer 36

electron

Question 37

proposed that an entirely new group was needed in the Periodic Table to accommodate noble gases

Answer 37

William Ramsay

Question 38

positive ion

Answer 38

anion

Question 39

vertical column of the Periodic Table

Answer 39

groups

Question 40

dense central core of an atom

Answer 40

nucleus

Question 41

material with electrical conductivity intermediate between that of metals which are good conductors and nonmetals which are nonconductors

Answer 41

semiconductors

Question 42

pure substance made of only one kind of atom

Answer 42

element

Question 43

elements of Group 1 of the Periodic Table

Answer 43

alkali metals

Question 44

discovered the final Noble Gas, radon

Answer 44

Friedrich Dorn

Question 45

Group 18 elements known for their chemical stability

Answer 45

Noble Gases

Question 46

fourteen elements with atomic numbers from 58 (cerium) to 71 (lutetium)

Answer 46

Lanthanides

Question 47

unit equal to 10 to the -12 meter; used to express atomic sizes

Answer 47

picometer

Question 48

transition elements where the last electron is being added to an inner shell d-sublevel

Answer 48

d-block

Question 49

shine characteristic of many metals

Answer 49

luster

Question 50

elements of the lanthanide and actinide series which gain their last electron in a deep lying f-sublevel

Answer 50

f-block

Question 51

horizontal row of Periodic Table

Answer 51

period

Question 52

an area within a principal energy level, usually designated s, p, d, or f

Answer 52

sublevel

Question 53

chemical property of atoms that resist combining with other atoms to form compounds

Answer 53

stability

Question 54

material that transfers heat and/or electricity readily

Answer 54

conductor