Atomic Structure Flashcards

(63 cards)

1
Q

The force of attraction/repulsion that exists between 2 charged bodies this will cause electricity

A

the electrostatic force

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2
Q

Is the set of physical phenomena associate with the present and flow of electrical charge

A

electricity

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3
Q

Is compose of molecules which are composed of atoms

A

Matter

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4
Q

who discover the transition of element table/periodic table and what year

A

Mendeleev 1869

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5
Q

According to the FAA what are the two categories of electricity

A

Static and current electricity

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6
Q

What are the maximum of electrons can exist the valence shell or orbit

A

8

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7
Q

An electron in the outer orbit and easy dislodge for conduction of electricity is known as

A

Free electrons

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8
Q

Force of attraction and repulsion between electrons and protons is

A

electrostatic force

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9
Q

how many electrons exist in the outer orbit of a conductor

A

less than 4

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10
Q

how many electrons exist in the outer orbit of a insulator

A

more than 4

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11
Q

term to describe electrons in the outer orbit of all atoms

A

Valence electrons

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12
Q

What two forces are capable causing free electrons to move

A

Magnetic and electrostatic

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13
Q

are all valence electrons free?

A

NO

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14
Q

Are all electrons surrounding an atom are involved in the flow of electricity

A

NO

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15
Q

What type of electricity is produced by magnetism

A

AC

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16
Q

Two types of useful electricity

A

AC and DC

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17
Q

What type of current batteries produced

A

Direct

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18
Q

requirements for producing electricity by magnetism

A

magnetic field
conductor
motion

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19
Q

Two types of electricity

A

Non-useful, useful

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20
Q

Current that can change in magnitude but not direction

A

DC

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21
Q

Current that continuously changes in magnitude and periodically changes in direction

A

AC

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22
Q

2 forces that drive electrons

A

electrostatic force

magnetic force

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23
Q

A substance that can not be separated into different substances

A

element

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24
Q

Element with 4 electrons in the valence shell

A

semiconductor

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25
Atom with the same number of electrons and protons
Balanced atom
26
An atom that's missing an electron
Positive ion
27
Smallest part of an element with the characteristics of an element
ATOM
28
Smallets component of a substance that still contains the characteristics of a substance
Molecule
29
An electron that can move from one atom to another
Free electron
30
A chemical combination of two or more elements
Compound
31
Atome that has gain or lost an electron
ION
32
Force that holds an atom together
electrostatic
33
Ability to an item to remain magnetized after a magnetic field contact
retentivity
34
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.
35
Production of electricity
``` Heat- DC Pressure- AC Light- DC chemical-DC Magnetism-AC ```
36
Who first experience the phenomenon of static electiciti
Benjamin frankling
37
Anything that has mass volume, physical substance
Matter
38
what determines a good conductor or insulator at the atom
The ability to give up of receive electrons
39
Best conductors and have on valence electron in the outer orbit
Gold and silver
40
Best insulators their outer orbits are full with valence electrons
Neon and helium
41
Best semiconductors have exactly 4 valence electrones
Silicon and germanium
42
Atom with too many or too few valence electrons is an
ION
43
Crystals under pressure can cause current to flow is known as
Piezoelectric effect use in microphones
44
Michael Faraday discover
magnetic field
45
Magnetic substances composed of a small areas where groups of atoms are aligned like the poles of a magnet its known as
Magnetic domains
46
The field of force existing between the poles of a magnet is
magnetic filed
47
Magnetic flux that is assumed to travel from north to south pole in a magnet is known as
Magnetic force
48
is known as a natural magnet
Lodestones
49
Magnetic force is also known as
Magnetic flux
50
Term in which a substance carries ease magnetic lines of flux
Permeability
51
Is the oposition that a substance has to magnetic lines of flux
Reluctante
52
Force which causes magnetic force to travel through a substance
Magnetomotive force
53
The unit of magnetic flux which represents 1 line of force
Maxwell
54
Measure of flux density which is equal to 1 maxwell/square centimeter
Gauss
55
Unit of flux density which is equal to 10,000 gauss/ squared centimeter of cross sectional area
Tesla
56
Space or substance transversed by magnetic line of force
Magnetic circuit
57
Examples of electromagnets
Solenoids and relays
58
Is the direct flow of electrons from one atom to another
electrical current
59
The push or pressure felt in a conductor that ultimately moves the electrons in a flow
Electromotive force EMF
60
EMF is produced by
``` Pressure Light Chemical action heat Magnetism ```
61
Unit of energy
Joule
62
defined as the ability to do work
energy
63
Ohms law
Current is directly proportional to the voltage and inversily proportional to the resistance