How is static electricity primarily produced?

Adding or removing electrons from the surface to create an imbalance of electric charge

By nuclear reactions releasing alpha particles

By chemical reactions that cause the sharing of electrons

Which of the following defines voltage?

The electric potential difference that drives current

The rate of flow of electric charge

The opposition to the flow of electric charge

The strength of a magnetic field

Which of the following best explains why the Earth acts as a large magnet?

The movement of molten iron in its core allows for aligned atoms and domains.

It has a very high temperature.

It is surrounded by a strong electric field.

What is the primary characteristic of alternating current?

The electrons move back and forth in the circuit.

The electrons move in one direction through the circuit.

The electrons collide more frequently than in other types of current.

The protons facilitate the movement of electrons.

Which of the following statements about electromagnetism are correct?

An electric current can produce a magnetic field.

A changing magnetic field can induce an electric current.

Magnetic materials have domains that can be aligned.

Opposite magnetic poles repel each other.

How does thermal energy primarily relate to the phases of matter?

Changes in thermal energy can cause changes in the phases of matter.

Thermal energy has no relation to the phases of matter.

Thermal energy only affects solids.

Thermal energy only affects gases.

What is the fundamental cause of electric charge in an atom?

An imbalance of protons and electrons

An imbalance of electrons and neutrons

An imbalance of protons and neutrons

An imbalance of gluons and quarks

If a solid reactant is broken into smaller pieces, what effect does this have on the rate of the reaction, and why?

The reaction rate increases because more surface area is available for collisions.

The reaction rate decreases because there are fewer collisions.

The reaction rate stays the same regardless of surface area.

The reaction rate decreases because the particles move slower.

How does the concept of valence electrons relate to the stability of an atom and its tendency to form bonds?

Atoms tend to gain, lose, or share valence electrons to achieve a full outer shell, thus becoming more stable.

Valence electrons have no effect on stability.

Atoms form bonds to lose valence electrons.

Atoms form bonds to increase their number of protons.

You are given the chemical formula C₆H₁₂O₆. What can you infer about this substance from its formula?

It is a covalent compound containing carbon, hydrogen, and oxygen in a specific ratio.

It is a radioactive isotope of carbon.

It is a mixture of carbon, hydrogen, and oxygen gases.

Why does the arrangement of the periodic table help explain why certain elements readily form chemical bonds with others?

Elements in the same group have similar valence electron configurations, explaining similar bonding behavior, and differences in electronegativity explain bond type.

The table only organizes elements by mass; mass dictates bonding.

The table shows elements by size; larger elements bond more easily.

The arrangement is random; it has no relation to bonding.

A chemical reaction produces heat. How would you classify this reaction, and what evidence supports your classification?

Exothermic, because heat is released into the surroundings, indicating that the products have lower energy than the reactants.

Endothermic, because heat is absorbed from the surroundings.

Neutral, because heat production does not change the reaction type.

Irreversible, because heat cannot be put back to reverse the reaction.

If a sealed container of gas is heated, what will happen to the pressure and why?

Pressure will increase because increased kinetic energy leads to more energetic collisions and more collisions overall of particles with the container walls and each other.

Pressure will decrease due to increased molecular spacing.

Pressure will remain the same; heat doesn't affect gas pressure.

Pressure may increase or decrease depending on the container's material.

Select the ways in which the organization of the periodic table reflects the electron configurations of the elements.

Elements in the same group have the same number of valence electrons.

Elements in the same period have the same number of electron shells.

Elements are randomly organized with no particular pattern.

Elements are arranged by their chemical names.

A scientist wants to increase the rate of reaction between two chemicals. Select the following methods she could use.

Increase the size of the container

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the opposition to the flow of electric current in a material?

Electric Force

Resistance

Static Electricity

Direct Current

MULTIPLE CHOICE QUESTION

Direct Current

Static Electricity

Electric Force

Decomposition Reaction

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Full Exam Review

What is the term for the opposition to the flow of electric current in a material?

Which term describes the force exerted by charged particles?

What is the phenomenon where electric charges accumulate on the surface of an object?

What are materials called that can be magnetized or attracted to a magnet?

Which subatomic particle has no electric charge?

What is the term for the number of protons in the nucleus of an atom?

What type of current flows in only one direction?

Which reaction involves one element being replaced by another element in a compound?

What type of reaction involves a single compound breaking down into two or more elements or new compounds?

Which subatomic particle has a positive charge?

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