Physical States of Elements @ 25 degree Celcius and normal atmosphere pressure
Semimetals
B, Si, Ge, As, Sb, Te, Po, At; metalloids
Nonmetals
Nonmetals (except H) are located on the top right of the periodic table, right of the stair step line
Metals and nonmetals on periodic table
Nonmetals with the exception of H are located on top-right of table Semimetals - are along the stair-step following B (except Al is a metal) All remaining elements are metals -located to left of of the stair step line
Nonmetals
dull appearance brittle many gases density - usually low poor conductors - make better insulators
What is the difference between chemical and physical changes
physical changes do not change formula - all atoms remain bonded in the same fashion, only the state of matter changes chemical change does change formula - you can produce a totally different chemical with atoms bonded in a different fashion.
Metals
shiny appearance malleable ductile most solids density - usually high good conductors of heat and electricity
which state of matter does not have it's own shape, but does have volume
Liquid
6 physical changes that occur between state of matter
Melting Freezing Boiling Condensing Sublimation Deposition
What diatomic element is a liquid at room temp and pressure
Bromine
Liquids only
Bromine (Br) and Mercury (Hg)
What is the physical shape at room temp and pressure for:
Chlorine - Gas Bromine - Liquid Iodine - Solid Carbon - Solid
What is the name of the physical change when a gas turns into a solid
Deposition
Which state of matter does not have its own shape or volume
Gas
Which state of matter is largely empty space
Gas
which physical state has variable volume and variable shape
Gas
At room temperature and normal atmospheric pressure (25C & 1 atm), elements occur as gases:
H2 -Hydrogen N2 - Nitrogen O2 - Oxygen F2 - Fluorine Cl2 - Chlorine
7 diatomic elements
H2(g), N2(g), F2(g) O2(g), I2(s) Cl2(g), Br2(l),
Formula for water after it is boiled
H2O so H2O (g)
Noble Gases
He -Helium, Ne - Neon, Ar - Argon, Kr - Krypton, Xe - Xenon, Rn - Radon
5 diatomic gases
Hydrogen - H2 Chlorine - Cl2 Nitrogen - S2 Fluorine - F2 oxygen - O2
Only diatomic solid
I - Iodine
what diatomic element is a solid at room temp and pressure
Iodine
which state of matter has constant shape and volume
Solid
which state of matter is most dense
Solid