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WorksheetsQuiz on Atomic Structure
Total questions: 69
Worksheet time: 35mins
What is the smallest indivisible unit of matter that retains the properties of an element?
Molecule
Atom
Proton
Electron
What subatomic particles are found in the nucleus of an atom?
Electrons and protons
Neutrons and electrons
Protons and neutrons
Electrons only
Which subatomic particle has a positive electrical charge?
Neutron
Electron
Proton
Atom
What is the charge of a neutron?
Positive
Negative
Neutral
Variable
What is the role of electrons in forming chemical bonds?
They are shared with other atoms
They remain in the nucleus
They have no role
They only repel other electrons
Diagram of a carbon atom showing protons, neutrons, and electrons.
Diagram of a nitrogen atom showing protons, neutrons, and electrons.
Diagram of an oxygen atom showing protons, neutrons, and electrons.
Diagram of a hydrogen atom showing protons, neutrons, and electrons.
Diagram of a carbon atom showing protons, neutrons, and electrons.
What is an element composed of?
Multiple types of atoms
Only one type of atom
Two or more types of atoms
A mixture of compounds
How many elements are currently known to scientists?
94
118
24
102
How many elements occur naturally on Earth?
24
118
94
102
What does the atomic number of an element represent?
Number of electrons
Number of neutrons
Number of protons
Number of atoms
What are materials composed of two or more elements called?
Mixtures
Solutions
Compounds
Alloys
What is an atom called when it gains an electron?
Cation
Anion
Proton
Neutron
What charge does an anion have?
Positive
Neutral
Negative
No charge
What happens to an atom when it gives up an electron?
It becomes a cation
It becomes an anion
It becomes a neutron
It becomes a proton
Why is an atom electrically neutral under normal conditions?
It has more protons than electrons
It has more electrons than protons
It has an equal number of protons and electrons
It has no protons or electrons
What does the law of charges state about opposite and like charges?
Opposite charges repel and like charges attract.
Opposite charges attract and like charges repel.
Opposite charges have no interaction and like charges attract.
Opposite charges attract and like charges have no interaction.
What prevents electrons from slamming into the nucleus?
Gravitational force
Magnetic force
Centripetal force
Nuclear force
How are electrons pulled away from protons in an atom?
By gravitational force similar to the moon's pull on Earth
By centripetal force similar to Earth's pull away from the sun
By magnetic force similar to a magnet's pull on metal
By nuclear force similar to the sun's pull on planets
What is the movement of charge carriers such as free electrons, holes, and ions called?
Voltage
Resistance
Current
Capacitance
What is the result of free electrons moving from one atom to another along a conductive path?
Electron current
Magnetic field
Thermal energy
Light emission
Why are electrons repelled by areas of negative polarity?
Because they have a positive charge
Because they have a negative charge
Because they are neutral
Because they have no charge
What was electricity first thought of as?
The flow of negative charges
The flow of positive charges
The flow of neutral particles
The flow of light particles
What is the term for the flow of positive charges from a point of positive polarity to a point of negative polarity?
Direct current
Alternating current
Conventional current
Static electricity
What is polarity in electrical terms?
The condition of being electrically positive or negative
The condition of being electrically neutral
The condition of being electrically charged
The condition of being electrically grounded
How is polarity commonly represented?
By using a plus sign for negative charges and a minus sign for positive charges
By using a minus sign for negative charges and a plus sign for positive charges
By using a zero sign for neutral charges
By using a star sign for all charges
What does the minus sign on a battery terminal indicate?
It is the positive terminal
It is the neutral terminal
It is the negative terminal
It is the grounded terminal
What are materials called that allow electrons to flow easily through them?
Insulators
Conductors
Semiconductors
Resistors
Which of the following is an example of a conductor?
Rubber
Wood
Silver
Plastic
What is the formula to calculate the maximum number of electrons in an electron shell?
2n
n2
2n2
n3
How many electrons can the first shell of an atom hold?
2
4
6
8
What is a valence electron?
An electron in the innermost shell
An electron in the outermost shell that can form chemical bonds
A proton in the nucleus
A neutron in the nucleus
Why are materials with one or two valence electrons excellent conductors?
They have a strong nuclear force
They can easily give up electrons to neighboring atoms
They have a high atomic mass
They have a large number of protons
What is the term used to describe the electrical pressure that directs electrons to move along a conductive path?
Current
Resistance
Voltage
Capacitance
Which of the following is NOT a source of voltage used in electrical circuits?
Batteries
Generators
Resistors
Photovoltaic cells
What is one of the devices mentioned as a source of voltage in electrical circuits?
Inductors
Thermocouples
Diodes
Transistors
What is a voltaic cell more commonly known as?
Capacitor
Resistor
Battery
Transformer
What separates the two electrodes in a battery?
Insulator
Electrolyte
Conductor
Semiconductor
Which electrode is negatively charged in a battery?
Anode
Cathode
Terminal
Diode
What happens to the voltage between a battery's electrodes after extended use?
It increases
It remains constant
It decreases to zero potential difference
It fluctuates randomly
What is the primary function of a generator?
To convert electrical energy into mechanical energy
To convert mechanical energy into electrical energy
To store electrical energy
To generate heat energy
Who discovered the principle of electromagnetic induction?
Isaac Newton
Albert Einstein
Michael Faraday
Nikola Tesla
In which decade did Michael Faraday make his discovery about electromagnetic induction?
1820s
1830s
1840s
1850s
What is voltage?
The flow of water in pipes
The difference in charge between two points
The speed of electrons
The resistance in a conductor
Who is the volt named after?
Isaac Newton
Nikola Tesla
Alessandro Volta
Albert Einstein
What is one volt defined as?
The potential difference required to move 1 amp across a conductor with 1 ohm of resistance
The energy needed to move 1 electron
The speed of light in a vacuum
The force exerted by a magnetic field
What causes resistance to the flow of water in pipes?
Temperature of the water
Friction between the water and the pipe's surface
Length of the pipe
Pressure of the water
What is electrical resistance measured in?
Volts
Amperes
Ohms
Watts
Which materials are mentioned as good conductors of electricity?
Polymers and ceramics
Copper and aluminum
Wood and glass
Rubber and plastic
Why are electrical cables wrapped in a protective layer of polymer?
To increase conductivity
To reduce weight
To provide resistance to the flow of electricity
To enhance flexibility
What does conductance (G) measure?
The resistance of a material
The voltage across a material
How easily electricity can pass through a material
The power consumed by a material
What is the unit of conductance?
Ohm
Volt
Ampere
Siemens
Who is the unit of conductance named after?
Nikola Tesla
Ernst Von Siemens
Thomas Edison
James Watt
What is the relationship between conductance (G) and resistance (R)?
G = R
G=R2
G = 1/R
G = R/2
What is the metric unit of power?
Joule
Watt
Volt
Ampere
In a direct current circuit, power is the product of which two quantities?
Voltage and Resistance
Current and Resistance
Voltage and Current
Power and Voltage
What does the symbol 'P' represent in electrical systems?
Pressure
Power
Potential
Phase
What is the basic unit for electrical charge?
Ampere
Volt
Coulomb
Ohm
Who was the coulomb named in honor of?
Isaac Newton
Albert Einstein
Charles Coulomb
Nikola Tesla
One coulomb of charge is equal to how many electrons?
1.6 x 10^19 electrons
6.24 x 10^18 electrons
3.0 x 10^8 electrons
9.8 x 10^9 electrons
What is a multimeter used to measure?
Current, voltage, and resistance
Temperature, pressure, and humidity
Speed, distance, and time
Mass, volume, and density
What additional capabilities might some multimeters have?
Measuring temperature and pressure
Measuring capacitance and frequency
Measuring speed and distance
Measuring mass and volume
What does the interface of a digital multimeter include?
A digital display, a dial, and connections for probes
A touchscreen, a keyboard, and a mouse
A printer, a scanner, and a copier
A camera, a microphone, and speakers
Which probe is considered the negative probe in a digital multimeter?
Red probe
Blue probe
Green probe
Black probe
What does the symbol "V~" represent on a multimeter?
DC Voltage
AC Voltage
Millivolts
Microamps
Which symbol is used for measuring resistance in ohms on a multimeter?
Ω
kΩ
MΩ
mA
What does the symbol "mA" stand for on a multimeter?
Millivolts
Microamps
Milliamps
Megohms
Which function does the symbol "A⎯⎯" indicate on a multimeter?
AC Current
DC Current
AC Voltage
Capacitance Test
What is the primary function of a resistor in an electrical circuit?
To increase the flow of electricity
To provide resistance to the flow of electricity
To store electrical energy
To convert electrical energy into light
How do resistors condition electricity in a circuit?
By increasing voltage and current
By reducing voltage and limiting current
By storing and releasing energy
By converting electricity into heat
