Static Electricity Quiz
The amount of charge carried by a lightning bolt is estimated at 10 coulombs. What quantity of excess electrons is carried by the lightning bolt?
(10C)(6.25 x 10^18)/1 C = 6.25 x 10^19
Determine the quantity and type of charge on an object that has 3.62×10^12 more protons and electrons
(3.62 x 10^12)(1.6 x 10^-19)/1 proton = +5.8 x 10^-7 Coulombs
The charge on a single proton is
+1.6 x 10^-19 C
Which of the following materials are likely to exhibit more conduct the properties and insulating properties? a. Rubber b. Aluminum c. Silver d. Plastic e. Wet skin
b c e
Protons and neutrons are _______ _______ ______ within the nucleus of the atom
bound tightly together
True or False: An object that is positively charged contains all protons and no electrons
False
The charge on a single electron is
-1.6 x 10^-19 C
For electrons to make a move from the atoms of one material to the atoms of another material there must be what three things?
1. An energy source 2. A motive 3. A low-resistance pathway
One coulomb is equal to the excess of how many electrons or protons?
6.25 x 10^18
What is a ground?
A large object that serves as an almost infinite source of electrons or sink for electrons. A ground contains such vast space that it is the ideal object to either receive electrons or supply electrons to whatever object needs to get rid of them or receive them
Electric force
A noncontact force; any charged object can exert this force upon other objects will charge an uncharged objects Opposites attract and likes repel
Electrons in lower energy cells can move to the higher energy outer shells by ________ __ ________
Addition of energy
Modern quantum mechanical view of the atom
And atom is composed of a variety of subatomic particles: protons, electrons, and neutrons
Ions
Atoms with a positive or a negative electrical charge
True or False: When an object becomes polarized, it acquires a charge and becomes a charged object.
False, polarization is just distribution of charges
Electrostatic forces
Both attractive and repulsive in nature, hold the world of Adams and molecules together in perfect balance
Atoms
Indivisible building blocks of matter
True or False: An object that is negatively charged could only contain electrons with no accompanying protons
False
The number of _______ will determine whether or not an atom is electrically charged or electrically neutral
Electrons
Negatively charged particles possess more _________ than _________
Electrons; protons
Uncharged particles contains an ___________ number of electrons and protons
Equal
True or False: An object that is electrically neutral contains only neutrons
False
Each shell has a distinct energy level Outer shells: _________ energy levels, _______ in stability
Higher, lower
Well the electrons are attracted to the protons in the nucleus, the addition of energy to an atom can persuade the electrons to?
Leave an atom
Electrons within atoms of other materials can be persuaded to __________ ______ _______ ____ _______ and ________ ________ of the electron shells of other atoms of different materials
Leave their own electron shells Become members
Insulators
Materials that impede the free flow of electrons from atom to atom and molecule to molecule
Conductors
Materials that permit electrons to flow freely from particle to particle
The charge of an object is what measurable quantity?
The coulomb
Shells
Outside the Nucleus Concentric spherical regions of space Home of the negatively charged electrons
Proton is charged _________, neutron has -_____charge and they said to be ________
Positively; no; neutral
Atoms of each element are distinguished from each other by the number of ________ that are present in their nucleus
Protons
___________ and ________ are the charged parts of an atom
Protons and electrons
A positively charged particle possesses more __________ than _________
Protons; eletrons
________ and __________ are the most massive; located in the nucleus of the atom
Protons; neutrons
Electrons in a higher energy cells can we move to the lower energy shell by ________ ____ _____
Release of energy
If provided sufficient energy, and electron can be ______ from an atom and be free from its attraction to the nucleus
Removed
Atomic structure
The atom consist of a densely packed Cora positive charge known as the nucleus surrounded by negatively charged electrons An atom consist of mostly of empty space the mass was packed into the nucleus that was small compared to the actual size of the atom
Explain what must happen in order for a neutral atom to become negatively charged
The atom must gain electrons
Explain what must happen in order for a neutral atom to become positively charged
The atom must lose electrons
The Law of Conservation of Charge
The overall charge on the system of two objects is the same after the charging process as it was before the charging process. Charge is neither created nor destroyed during this charging process; it is simply transferred from one object to the other object in the form of electrons
Polarization
The process of separating opposite charges within an object Charges are not created, just transferred
True or False: Charged objects and neutral objects attract
True
True or False: Electrical forces can cause object to attract or repel each other
True
A rubber balloon possesses a positive charge. If brought near and touched to the door of a wooden cabinet, it sticks to the door. This does not occur with an uncharged balloon. These two observations can lead one to conclude that the wall is _____. a. electrically neutral b. negatively charged c. a conductor d. lacking electrons
a
Suppose that a conducting sphere is charged positively by some method. The charge is initially deposited on the left side of the sphere. Yet because the object is conductive, the charge spreads uniformly throughout the surface of the sphere. The uniform distribution of charge is explained by the fact that ____. a. the charged atoms at the location of charge move throughout the surface of the sphere b. the excess protons move from the location of charge to the rest of the sphere c. excess electrons from the rest of the sphere are attracted towards the excess protons
c
A conductor differs from an insulator in that a conductor ________. a. has an excess of protons b. has an excess of electrons c. can become charged and an insulator cannot d. has faster moving molecules e. does not have any neutrons to get in the way of electron flow f. none of these
f
What does "atomos" mean in greek?
indivisible