TEST_DE_CH_2.4_StructureOfThePeriodicTable

solids, luster, brittle, conductors, medium density

mostly solids, dull, brittle, reactive, conductors

mostly gases, brittle, dull, low density, insulators

mostly solids, luster, high density, conductors

solar cells

jewelry

fireworks

insulation

solids, luster, malleable, conductors, reactive

mostly solids, luster, high density, conductors

mostly gases, brittle, dull, low density, insulators

mostly solids, dull, brittle, reactive, conductors

electrical conductors

thermal conductors

metal oxides

light bulbs

O, S

H, He

Ar, Kr

F, Cl

all solids, shiny, brittle, conductors, medium density

mostly gases, brittle, dull, low density, insulators

mostly solids, shiny, high density, conductors

mostly solids, dull, brittle, reactive, conductors

9

27

4

18

solids, soft, brittle, reactive, conductors

mostly gases, brittle, dull, low density, insulators

mostly solids, luster, high density, conductors

solids, luster, brittle, conductors, reactive

soft, shiny, reactive

brittle, shiny, unreactive

soft, dull, unreactive

brittle, dull, unreactive

Ra

Ta

Na

B

They are metals, have four valence electrons, and are generally unreactive.

They are non-metals, have four valence electrons, and are generally reactive.

They are semiconductors, have four valence electrons, and are generally stable.

They are metalloids, have four valence electrons, and are generally reactive.

they have one valence electron

they have two valence electrons

they have three valence electrons

they have four valence electrons

They are gases at STP, unreactive, and are generally monatomic

They are gases at STP, reactive, and are generally monatomic

They are gases at STP, reactive, and are generally diatomic

They are gases at STP, unreactive, and are generally diatomic

F

Ni

Na

Xe

metals and halogens

non-metals and halogens

metals and non-metals

alkali and alkali earth metals

they have one valence electron

they have two valence electrons

they have seven valence electrons

they have eight valence electrons

Ce

Lu

Dy

Eu

Atomic number increases from right to left

Atomic mass increases from left to right

Periods contain whole families

Periods contain whole groups

all have similar chemical and physical properties

all exist in the same state of matter

all have the same atomic mass

all have the same number of neutrons