Chemical Reactions Quiz

What do Lewis Dot Diagrams represent?

• The mass of an atom

• The arrangement of protons in an atom

• The valence electrons of an atom

• The types of chemical bonds present

Tags

NGSS.HS-PS1-1

In a chemical reaction, what happens to the atoms of the reactants?

• They are destroyed

• They remain unchanged

• They are rearranged to form new products

• They are turned into energy

Tags

NGSS.MS-PS1-5

Which of the following best describes the difference between reactants and products in a chemical equation?

• Reactants are the substances formed, while products are the starting materials.

• Reactants are the starting materials, while products are the substances formed.

• Reactants are always solids, while products are always gases.

• Reactants do not participate in the reaction, while products do.

Tags

NGSS.MS-PS1-1

What is the purpose of balancing chemical equations?

• To ensure that energy is conserved

• To show the physical states of the reactants and products

• To ensure that the number of atoms for each element is the same on both sides of the equation

• To indicate the temperature of the reaction

Tags

NGSS.MS-PS1-5

Which process involves the splitting of a heavy nucleus into smaller nuclei, releasing energy?

• Nuclear fusion

• Nuclear fission

• Nuclear decay

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NGSS.HS-PS1-8

What is nuclear fusion?

• The process of combining lighter nuclei to form a heavier nucleus

• The process of breaking down heavy nuclei into lighter ones

• The release of energy from radioactive decay

• The splitting of atoms to release energy

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NGSS.HS-PS1-8

How is atomic mass determined?

• By counting the number of electrons

• By averaging the mass of all isotopes of an element

• By multiplying the number of protons by the number of neutrons

• By adding only the number of protons

Which particles are considered subatomic?

• Protons and electrons only

• Protons, neutrons, and electrons

• Neutrons and ions only

• Electrons and compounds only

What occurs when electrons are in an excited state?

• They are at their lowest energy level.

• They emit energy in the form of photons when returning to the ground state.

• They gain mass.

• They cease to exist.

Tags

NGSS.HS-PS4-3

How does light behave?

• Only as a wave

• Only as a particle

• As a wave and a particle

Tags

NGSS.HS-PS4-3