chem ( period table )

periodic table

a chart that organizes all known elements in universe according to chemical properties or increasing atomic number

groups

vertical columns

form families because of similar properties

period

Horizontal rows

Metals 

shiny 

solid at room temperature 

conductors 

malleable / ductile ( flattened not shatter) 

non-metals

dull

mostly gaseous

poor conductors

brittle ( shatter easily)

Metalloids

elements with characteristics of metal and nonmetal

solid

semi-conductor

Akali Metals ( IA)

React with water to form an alkaline solution

soft SILVER COVERED 

very reactive 

Alkali Earth Metals ( IIA)

reactive not as

soft

important minerals

found in rocks in the Earths Crust

Transition metals ( 3-12)

less reactive , harder metals

malleable ( easily bent / hammered into wires or sheets) 

used in jewelry, money , construction 

Metalloids

properties /characteristics of metals and non-metals

group 14

contains elements for life and computers

C (basic element in Org Chemistry)

Si/ Ge - important semi-conductors

group 15

N- ¾ of atmosphere

P - red tip of matches 

group 16

O - respiration 

bad odor - S

Halogens

one electron to fill their outer most shells

poisonous and reactive

Noble gases

almost non reactive

gases

neon signs

he - party Balloons

Lanthanide series 

shiny reactive metals 

found in nature 

Actinide series

radioactive and unstable

man made

which elements are gases 

H , N,O,F , CL  and Nobel gases 

which elements are liquid

Hg and Br

Ag (Silver) –

Excellent conductor of heat; if a silver mug holds boiling water, the handle becomes too hot quickly

• Hg (Mercury)

Liquid at room temperature; freezes at −40 °C

• Br (Bromine) –

• A dark orange liquid that vaporizes easily at room temperature.

• He (Helium) –

• Formed underground as a by-product of radioactive decay; used to fill balloons.

• Zn (Zinc)

• – Low melting point; commonly used for making coins

• Si (Silicon)

• Ultra-pure silicon is sliced into wafers for integrated circuits (electronics).

Titanium ( Ti) 

– Strong and corrosion-resistant alloys; used for hip implants.

Carbon

About 50,000 pounds of synthetic diamonds (made from carbon) are produced yearly