202 lab

Atomos

Greek word of an atom

Means cannot be cut or indivisible

Tomo

Greek word tha mean sliced/to cut

Used in tomography

Niels Bohr

Describe his atom similar to solar system

Planetary model

Nucleus and orbital shells

2 parts of an atom

Nucleus

Located at the center on an atom

Where neutrons and protons are located

orbital shells

Surrounds the nucleus

Where electrons are located

+1.6×10^-19C

Charge of proton

0

Charge of neutron

-1.6×10^-19C

Charge of electron

1.63×10^-27kg

Mass of protons

1.65×10^-27kg

Mass of neutron

9.11×10^-31kg

Mass of electron

Same charge=repel

Diff charge=attract

Fundamentallaw of electrostatic

Symbol of element

X

Atomic number

Z

Number of protons

Number of neutrons

N

Atomic mass number/weight

A

Z+N

It has centrifugal force and they have diff charge

Why does the electron not fall at high speed?

K

Start of an electron

Has high attraction

Electrons will leave

If centrifugal increases

Cation

The nucleus have greater proton than electron because it transfer in another atom

Gin halinan sang electron

Anion

Gin transferan kang electron

Negative

Ground

Reservoir of charges

Isotopes

Protons: S

Neutrons: D

Atomic mass: D

Isotones

Protons: D

Neutrons: S

Atomic mass: D

Isobars

Protons: D

Neutrons: D

Atomic mass: S

Isomers

Protons: S

Neutrons: S

Atomic mass: S

metastable

Natural/background

Artificial/manmade

Sources of radiation

Ionizing and non ionizing

Classification of radiation

Ionizing

Removing

Non ionizing

Cannot remove

Wavelength

Distance from one crest to another

Inversely

Wavelength and frequency

Directly

Frequency and energy

Inversely

Wavelength and energy

Radio wave

Microwave

Infrared

Visible light

Ultraviolet

X-ray

Gamma ray

Types of electromagnetic radiation

Electromagnetic and particulate

Types of radiation

Number of shells

N is in 2n2