Ch. 3 Ch. 3 Sec. 3 MetalsSec. 3 Metals

physical properties of a metal

• hardness• shininess• =can be pounded into shapes• =can be pulled out into a long wire • - can transmit heat & electricity• magnetic• most are solids at room temp.

(except ___________ )

malleableductileconductor

mercury

can be pounded into shapes

malleable

malleable

can be pounded into shapes

chemical properties of a metal• __________= ease & speed at

which an element combines or reacts with other elements

• some - very reactive (ie. sodium)

• others - unreactive (ie. gold)

reactivity

• __________= ease & speed at which an element combines or reacts with other elements

• some - very reactive (ie. sodium)

reactivity

Chunk of sodium in school pond

corrosion •process of reaction & wearing away

•ie. iron rusting

alloy

• mixture of metals

• ie. copper + tin= bronze

Metals in the Periodic Table

Group 1- alkali metals

– from Li Fr (not H)

– very, very reactive

– have 1 valence electron

Lithium reacting with water

Potassium reacting with water

Group 2- alkaline earth metals• 2nd column

• Be Ra

• very reactive- never alone

• lose 2 valence electrons

• most common- Ca & Mg

Groups 3-12 - transition metals

• bridge between very reactive metals & less reactive metals

– ex: Fe, Ag, Pt

Groups 13-16

– incl metals, nonmetals & metalloids

– ex. Al, Sn, Pb

lanthanides & actinides- rare earth elements

• found @ bottom of periodic table• fit in periods 6 & 7• placed at bottom for convenience

Neodymium, one of the lanthanide elements, is used in manufacturing the

tiny speakers inside stereo headphones.

Curium, one of the actinide elements,is used as a source of high-energy particles

that heat and provide power for certain scientific equipment aboard the Mars

Exploration Rover.

synthetic elements

• elements w/ atomic # > 92

• not found naturally on Earth

• made when nuclear particles collide

particle accelerators• make elements above atomic #95

• move atomic nuclei until reach very high speeds

  unununium

ununilium

• Element 110-118, elements with three-letter symbols, have been given temporary names and symbols.

• In the future, scientists around the world will agree on permanent names and symbols for these elements.