Untitled Flashcards Set

Physical properties: boiling/melting point, density

Chemical properties: rusting, reativity, toxicity

Evidence of chemical changes: evolution of gas, change in temp, formulation of solid, color change of indicator

Extensive properties – depend on amount of substance: mass, volume

Intensive – does not depend on amount of substance: melting point, bloiling point, density, area, length, number of particles

Know tera to nanometers

Volume = L

Mass = kg

Length = m

Amount = mole

Temp = kelvin

Given unit/1 x new unit/given unit

Kelvin scale = absolute scale

0k = absolute zero

Celsius scake = k +273.15

Isotopes are atoms with the same number of protons but different numbers of neutrons

A (mass number) = Z(protons) + N(Neutrons)

X is element symbol from periodic table

Metals – shiny, malleable, ductile, good conductor, lose electron easily

Metaloids - between

Nonmetal – brittle, not good conductor, gain electrons easily

Group 18 (8A):  noble gasses - least reactive

Group 1 (1A): alkali metals – accept H, very reactive

Group 2 (2A): alkali earth metals -

Group 17: halogens – F,Cl,Br,I,At

Group 3-12: transition metals – B group element

Metals lose electrons and nonmetals gain electrons because: Na 11p and Neutral atom = 11e-. lose 1 electron Na+ 11 proton but 10 electron

Na undergoes ionization, it loses an electron, gains a positive charge and becomes a cation

Molecular formula – shows number of atoms

Empirical formula – simplified version of molecular in smallest raio

Structural formula – line diagram of molecule indicating connectivity of atoms

Covalent bonding – nonmetals combining by covalent bonding. Sharing electrons

Ionic bonding, metal combined with nonmetal NA+Cl- : ions are attracted by electrostatic forces of attraction. NaCl is a formula unit

Ionic compounds: high melting and boiling point, solid at room temp, crystalline structure, conduct electricity when molten or dissolved, hard and brittle

Mole = mass/molar masss

# of particles = moles x Na = 6.0 x 10^33

Tera = 1,000,000,000,000 or 10^12

Giga = 1,000,0000,000 or 10^9

Mega = 1,000,000 or 10^6

kilo = 1,000 or 10^3

hecto = 100 or 10^2

deca = 10 or 10^1

deci = 0.1 or 10^-1

centi = 0.01 or 10^-2

milli = 0.001 or 10^-3

micro = 0.000001  or 10^-6

nano = 0.000000001 or 10^-9

C = (f-32)*(5/9)

F = (9/5 x c)+32

K = C+273.15

6.022 x 10^23 = avagadros number

• R = 0.0821 L·atm/(K·mol) - Ideal gas constant

• R = 0.0821 L·atm/(K·mol) - Ideal gas constant