CH.5 vocab

Question 1

periodic table

Answer 1

is an arrangement of elements in columns, based on a set of properties that repeat from row to row

Question 2

period

Answer 2

each row in the table of elements is a period ( 7 periods)

Question 3

group

Answer 3

each column on the periodic table is a group

Question 4

periodic law

Answer 4

the pattern of repeating properties

Question 5

Atomic mass unit

Answer 5

is defined as one-twelfth the mass of a carbon- 12 atom

Question 6

metals

Answer 6

are elements that are good conductors of electric current and heat

Question 7

transition metals

Answer 7

are elements that form a bridge between the elements on the left and right side of the table

Question 8

nonmetals

Answer 8

are elements that are poor conductors of heat and electric current

Question 9

metalloids

Answer 9

are elements with properties that fall between those of metal and nonmetal

Question 10

valence electrons

Answer 10

is an electron that is in the highest occupied energy level

Question 11

alkali metals (extremely reactive)

Answer 11

elements in group 1 A

Question 12

alkaline earth metals

Answer 12

elements in group 2 A

Question 13

halogens

Answer 13

elements in group 7 A

Question 14

noble gases

Answer 14

elements in group 8 A