Intro to the Basic
Atom Structure
Electricity
V
Whose current is it?
100
The 16th century Latin word which describes a static build up of static electricity
What is "electrica'
100
Niels Bohr was a Danish scientist who introduced the model of an atom in 1913. Bohr's model consists of a central nucleus surrounded by tiny particlesthat are orbit the nucleus in a cloud. What are these particles?
What is electrons?
100
The flow of electrons can be directed through materials and this flow is called ________ __________.
What is electrical current or current electricity?
100
We also need to know something about the force that causes the electrons to move in an electrical circuit. This force is called _____________ ___________________.
What is electromotive force, or EMF?
100
Materials that have free electron and allow current or flow of electrons fairly easily.
What is conductors?
200
All matter is made of these particles.
What is an atom?
200
Electrons are said to have a negative charge, which means that they seem to be surrounded by a kind of invisible force field. This is called an _________ _______________
What is electrostatic field?
200
Materials that have free electrons and allow electrical current to flow easily are called ______________.
What is conductors?
200
EMF is measured in units called _________.
What is volts?
200
These are materials that have just the opposite effect on the flow of electrons. They do not let electrons flow very easily from one atom to another.
What is insulators?
300
A subtance made up of only one type of atom.
What is an element?
300
The copper atom has 29 protons in its nucleus with 29 electrons orbiting the nucleus. Notice that in the copper atom, the electrons are arranged in several layers called __________. This means the electrons the energy of an electron is restricted to a few particular energy levels.
What is a shell or electron shell?
300
Many materials do not have any free electrons. Because of this fact, they do not tend to share their electrons very easily and do not make good conductors of electrical currents. These materials are called ________________ .
What is insulators?
300
________________ is a term that describes the forces that oppose the flow of electron current in a conductor. All materials naturally contain some.
What is resistance?
300
Probably the most important mathematical relationship between voltage, current and resistance in electricity is something called __________ _____________.
What is “Ohm’s Law”?
400
A substance that is made up more than one type of atom.
What is compound?
400
The outermost shell of an atom called the __________ shell.
What is valence?
400
The term used to describe the energy produced (usually to perform work) when electrons are caused to directional (not randomly) flow from atom to atom.
What is electricity?
400
Resistance is measured in units called ______________.
What is ohms?
400
The symbol for an Ohm looks like a __________and is pictured after the number in a solution.
What is horseshoe?
500
The organized chart lists the basic elements and some of their properties.
What is the Periodic Table of Elements?
500
When the valence electron in any atom gains sufficient energy from some outside force, it can break away from the parent atom and become what is called a_______________ __________________.
What is free electron?
500
The term __________ is the amount of electrical current that exists when a number of electrons, having one coulomb (ku`-lum) of charge, move past a given point in one second.
What is amps?
500
Components are added into an electrical circuit to restrict the flow of electricity and protect the components in the circuit. These are called _____________.
What is resistors?
500
A battery, wires and various components connected together form a
What is a circuit?
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