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ION
atom that has gained or lost an electron
CATION
-Positive
-More protons than electrons, so LOST one or more electron
ANION
- Negative
- more electrons than protons, so GAINED one or more electron
IONIZATION
Process of losing (anion) or gaining (cation) on or more electron
ISOTOPE
ATOMS WITH:
SAME number of PROTONS
DIFFERENT number of neutrons
-changing number of neutrons
ISOBAR
- DIFFERENT number of protons (atomic number) and neutrons
- SAME mASS number
(isoBAR- gym bar) (isoBAR- mASS)
ISOMER
-DIFFERENT ENERGY LEVEL
-same number of protons and neutrons
ISOTONE
- SAME number of neutrons
- different number of protons (different
What are the two combination of atoms
IONIC AND COVALENT BONDS
IONIC BOND
-TRANSFER of electrons
-Donates and accepts electrons
-ex. Na+ Cl -->NaCl
COVALENT BOND
- SHARING of electrons to form a stable octet
-ex. H2O
MECHANICAL ENERGY
RESULT OF ACTION FROM A MACHINE
KINETIC- MOTION
POTENTIAL- POSITION (stored energy)
CHEMICAL ENERGY
- Energy released from a chemical reaction
HEAT/ THERMAL ENERGY
-energy of heat
-Result of motion of atoms and molecules
-MOVEMENT OF MOLECULES
ELECTRICAL ENERGY
Results from movement of electrons in a conductor
NUCLEAR ENERGY
energy stored in the nucleus of an atom—the energy that holds the nucleus together
ELECTROMAGNETIC ENERGY
Results from electric and magnetic disturbances
-ex. radiowaves, microwaves, infrared light, visible light, cosmic rays
electromagnetic spectrum
SHORTEST: CAN-
COSMIC
GRANNY- GAMMA
X- X-RAY
USE- UV
VINEGAR- VISIBLE
IN- INFRARED
MINUTE- MICROWAVE
LONGEST: RICE- RADIO
WAVE THEORY
Energy that travels in the forms of waves
RADIOACTIVITY
The emission of particles and energy in order for an atom to become stable
TWO TYPES OF RADIOACTIVITY
BETA EMISSION
ALPHA EMISSION
WAVELENGTH
The distance between two corresponding parts of a wave (CREST TO CREST) (TROUGH TO TROUGH)
- INVERSELY PROPORTIONAL WITH FREQUENCY
AMPLITUDE
INTENSITY of wave defined by maximal height
FREQUENCY
the number of complete wavelengths that pass a point in a given time
-high frequency= shorter wave
- low frequency= longer waves
- INVERSELY PROPORTIONAL WITH WAVELENGTH
PERIOD
Time required to complete one cycle of wave
PARTICLE THEORY
When high- frequency Electromagnetic radiation interacts with matter MORE LIKE A PARTICLE AND NOT A WAVE
PHOTON
small bundle of energy
- the relationship between photon energy and frequency is DIRECTLY PROPORTIONAL
RADIOISOTOPE
- Unstable nucleus
- formed when too much energy is produced in an atom of an isotope of particular element
ELECTRIC BINDING ENERGY
Energy needed to eject electron from atom
RADIOACTIVITY
The emission of particles and energy in order for an atom to become stable.
ALPHA EMISSION
-Atom emits particle made of 2 protons and 2 neutrons (He nucleus)
BETA EMISSION
-Electron (-) or positron (+) ejected from the nucleus
Creates small loss of mass and loss of charge
-At the same time a neutron undergoes conversion into a proton. CHANGES THE ELEMENT BUT NOT THE MASS
HALF- LIFE
the period of time required for a radioisotope to reduce its radioactivity to 50% of its strength.
- T 1/2
TYPES OF IONIZATION RADIATION
PARTICULATE and ELECTROMAGNETIC
TWO TYPES OF PARTICULATE RADIATION
alpha (helium nucleus- 2 protons and t neutrons) and beta particles (electron emitted from the nucleus)
ELECTROMAGNETIC RADIATION
Oscillating electric and magnetic fields that travel in a vacuum with the velocity of light
two types of electromagnetic radiation
x-rays and gamma rays