Atomic Structure Flashcards
The force of attraction/repulsion that exists between 2 charged bodies this will cause electricity
the electrostatic force
Is the set of physical phenomena associate with the present and flow of electrical charge
electricity
Is compose of molecules which are composed of atoms
Matter
who discover the transition of element table/periodic table and what year
Mendeleev 1869
According to the FAA what are the two categories of electricity
Static and current electricity
What are the maximum of electrons can exist the valence shell or orbit
8
An electron in the outer orbit and easy dislodge for conduction of electricity is known as
Free electrons
Force of attraction and repulsion between electrons and protons is
electrostatic force
how many electrons exist in the outer orbit of a conductor
less than 4
how many electrons exist in the outer orbit of a insulator
more than 4
term to describe electrons in the outer orbit of all atoms
Valence electrons
What two forces are capable causing free electrons to move
Magnetic and electrostatic
are all valence electrons free?
NO
Are all electrons surrounding an atom are involved in the flow of electricity
NO
What type of electricity is produced by magnetism
AC
Two types of useful electricity
AC and DC
What type of current batteries produced
Direct
requirements for producing electricity by magnetism
magnetic field
conductor
motion
Two types of electricity
Non-useful, useful
Current that can change in magnitude but not direction
DC
Current that continuously changes in magnitude and periodically changes in direction
AC
2 forces that drive electrons
electrostatic force
magnetic force
A substance that can not be separated into different substances
element
Element with 4 electrons in the valence shell
semiconductor
Atom with the same number of electrons and protons
Balanced atom
An atom that’s missing an electron
Positive ion
Smallest part of an element with the characteristics of an element
ATOM
Smallets component of a substance that still contains the characteristics of a substance
Molecule
An electron that can move from one atom to another
Free electron
A chemical combination of two or more elements
Compound
Atome that has gain or lost an electron
ION
Force that holds an atom together
electrostatic
Ability to an item to remain magnetized after a magnetic field contact
retentivity
The strength of a magnetic field produced when current flows thru a conductor is directly proportion to the current flowing thru it
Is very true.
Production of electricity
Heat- DC Pressure- AC Light- DC chemical-DC Magnetism-AC
Who first experience the phenomenon of static electiciti
Benjamin frankling
Anything that has mass volume, physical substance
Matter
what determines a good conductor or insulator at the atom
The ability to give up of receive electrons
Best conductors and have on valence electron in the outer orbit
Gold and silver
Best insulators their outer orbits are full with valence electrons
Neon and helium
Best semiconductors have exactly 4 valence electrones
Silicon and germanium
Atom with too many or too few valence electrons is an
ION
Crystals under pressure can cause current to flow is known as
Piezoelectric effect use in microphones
Michael Faraday discover
magnetic field
Magnetic substances composed of a small areas where groups of atoms are aligned like the poles of a magnet its known as
Magnetic domains
The field of force existing between the poles of a magnet is
magnetic filed
Magnetic flux that is assumed to travel from north to south pole in a magnet is known as
Magnetic force
is known as a natural magnet
Lodestones
Magnetic force is also known as
Magnetic flux
Term in which a substance carries ease magnetic lines of flux
Permeability
Is the oposition that a substance has to magnetic lines of flux
Reluctante
Force which causes magnetic force to travel through a substance
Magnetomotive force
The unit of magnetic flux which represents 1 line of force
Maxwell
Measure of flux density which is equal to 1 maxwell/square centimeter
Gauss
Unit of flux density which is equal to 10,000 gauss/ squared centimeter of cross sectional area
Tesla
Space or substance transversed by magnetic line of force
Magnetic circuit
Examples of electromagnets
Solenoids and relays
Is the direct flow of electrons from one atom to another
electrical current
The push or pressure felt in a conductor that ultimately moves the electrons in a flow
Electromotive force EMF
EMF is produced by
Pressure Light Chemical action heat Magnetism
Unit of energy
Joule
defined as the ability to do work
energy
Ohms law
Current is directly proportional to the voltage and inversily proportional to the resistance
