Chem Chp. 1

Front 1

Atom

Back 1

-smallest particle of matter that retains its identity

Front 2

subatomic particles

Back 2

1. proton
2. neutron
3. electron

Front 3

proton

Back 3

-a subatomic particle
-located in the nucleus
-+ charge
-mass=1 amu
-atomic nbr (defines the element)

Front 4

neutron

Back 4

-located in the nucleus
-no charge
-mass=1 amu
-along with the protons define the atomic mass
-give us isotopes in some cases

Front 5

electron

Back 5

- -negative charge
-located around the nucleus in orbitals
-mass= 1/2000 amu (negligible)
-help define the chemical properties by their arrangement around the nucleus (outer shell electrons)

Front 6

electromagnetic radiation

Back 6

a form of energy transmitted or propagated in waves

Front 7

wavelength

Back 7

-symbol is λ (greek letter lambda)
-the distance between two corresponding distances in the wave train
-long λ=low energy, short λ=high energy
-wavelength = speed of light/frequency ( λ=c/ν )
-measured in nm in electromagnetic spectrum

Front 8

frequency

Back 8

-# of maximum passing a point per unit time
-measured in Hertz (Hz) per second (s)...1 Hz = 1 s⁻1 (*should be superscripted 1)
-symbol is greek letter nu (ν)
- frequency = speed of light/wavelength ( ν=c/λ )

Front 9

amplitude

Back 9

-height of the wave
-related to intensity (amplitude ^ 2 (*squared) = the intensity)

Front 10

speed of light

Back 10

-symbol (c)
- c=2.998 x 10⁸ m s⁻1

Front 11

energy

Back 11

-energy (E)
- E = h (plank's constant) ν (energy=plank's constant x frequency)